Conjugate Acid Questions and Answers

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Conjugate Acid Questions and Answers

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Rank the compounds below in order of increasing basicity: HS^-, C_2O_4^2-, NH_2^-
Explain how solutions are classified as acids or bases. Then, provide an example of a weak acid.
Explain how to obtain the conjugate acid of CO3^- base.
Explain how to obtain the conjugate acid of HSO^4- base.
Explain how to obtain the conjugate acid of HS^- base.
Explain how to obtain the conjugate acid of PO4^3- base.
Complete the following list by filling in the missing oxyanion or oxyacid for each pair.
For each of the following aqueous reactions, identify the acid, the base, the conjugate base, and the conjugate acid.
Consider 1.0 L of a solution that is 0.85 M HOC6H5 and 0.80 M NaOC6H5. (Ka for HOC6H5 = 1.6 10-10.) a. Calculate the pH of this solution. b. Calculate the pH after 0.10 mole of HCl has been added...
Sodium azide (NaN_3) is sometimes added to water to kill bacteria. Calculate the concentration of all species in a 0.010 M solution of NaN_3. The K_a value for hydrazoic acid (HN_3) is 1.9 times 10...
Write a structural formula of the conjugate acid formed by the reaction of formaldehyde with HCl.
Write a structural formula of the conjugate acid formed by the reaction of CH3CH2OH with HCl.
2,4-Pentanedione is a considerably stronger acid than is acetone. Write a structural formula for the conjugate base of each acid and account for the greater stability of the conjugate base from 2,4...
Which of the following compounds is the strongest acid?
Identify the conjugate acid-base pairs from the chemical equation. HCO3-(aq) + H2O(l) ? H2CO3(aq) + OH-(aq)
Identify the conjugate acid-base pairs from the chemical equation. HF(aq) + H2O(l) to F-(aq) + H3O+(aq)
Which of the following acids have relatively strong conjugate bases? a. CH3COOH b. HF c. H2S d. HCl
Which of the below bases have relatively strong conjugate acids? a. F^- b. Cl^- c. HSO4^- d. NO3^-
Identify the conjugate acid-base pairs of the chemical reaction C2H3O2-(aq) + H2O(l) to HC2H3O2(aq) + OH-(aq).
Acetate ion(C2H3O2-) has a stronger affinity for protons than does water. Therefore, when dissolved in water, acetate ion behaves as a(n) ___.
Which of the below acids have relatively strong conjugate bases? a. HCN b. H2S c. HBrO4 d. HNO3
Write the conjugate base for each of the following acids. a. HBrO b. HNO_2 c. HSO_3^- d. CH_3NH_3^+
Write the conjugate acid for each of the following. a. NH_3 b. NH_2^- c. H_2O d. OH^-
Write the conjugate base for each of the following acids. a. H_2S b. HS^- c. NH_3 d. H_2SO_3
Write the conjugate acid for each of the following bases. a. ClO^- b. Cl^- c. ClO_3^- d. ClO_4^-
Given the following substances in order of increasing acid strength HOCl(aq) < CH_3COOH(aq) < HC_2O_4^-(aq) < HOCN(aq) < HNO_2(aq) < HCl(aq) Which one of the species in the set listed below is the...
Choose pairs in which the species listed first is the conjugate base of the species listed second. a. ^S_2^-, HS^- b. H^+, OH- c. HBr, Br^- d. NO2-, HNO2
Trisodium phosphate (TSP) is an effective grease remover. Like many cleaners, TSP acts as a base in water. Write a balanced equation to account for this basic behavior.
Draw the conjugate base of the given compound.
Calculate the hydrolysis constant for the given anion of the weak acid. HCOO-
Calculate the hydrolysis constant for the given anion of the weak acid. NO2 -
For the reaction: Benzoic acid + ethoxide rightleftharpoons benzoate + ethanol. Find the conjugate acid.
For the reaction: Ethoxide + toluene rightleftharpoons ethanol + benzyl anion Find the conjugate acid.
Calculate the pOH of a hypothetical 0.100 M BH+ solution. Kb = 1.0 x 10-7 B (aq) + H20 (l) = BH+ (aq) + OH- (aq)
In the Acid-Base reaction shown below, write the structure of the conjugate base of tropolone. Using curved arrow notation write down all possible resonance structures for this conjugate base.
Ephedrine is used both as a stimulant and a decongestant and is also a weak base (K_b = 4.0 times 10^{-5}). What is the value of K_a for its conjugate acid at 25.0 degrees C?
Write the balanced chemical equation for the ionization(or dissociation) that is believed to occur when hydrofluoric acid (HF) dissolves in water. Use a single arrow (reaction arrow) to indicate a...
The 1,1'-diethyl-2,2'-dicarbocyanine cation has a conjugated carbon-carbon double bond system. If there are 10 \pi electrons in the conjugated system, and the molecule has an initial strong absorpt...
Which one of the following is NOT a chemical preservative? A. Propionic acid B. Penicilloic acid C. Sulfur dioxide D. Benzoic acid
Predict which base of the mentioned pair is the stronger base. Briefly explain how you arrived at your answer. HPO4 2- or PO43-.
Calculate the concentration of OH- and the pH for the following solutions. (a) 0.45 M NH3(aq) and 0.35 M NH4NO3; (b) 0.10 M aniline, C6H5NH2, and 0.25 M anilinium chloride, C6H5NH3Cl.
Some of the following salts are used in detergents and other cleaning materials because they produce basic solutions. Which of the following could not be used for this purpose? Write equations to j...
Consider the titration of 100 mL of 0.50 M formic acid using 1 M NaOH. What volume of NaOH is required to reach the equivalence point?
Classify each reactant and product in the mentioned chemical reaction as a Bronsted-Lowry acid, a Bronsted-Lowry base, or neither. Arrange the species in the given reaction as conjugate acid-base p...
Mark each reactant and product in the given chemical reaction as a Bronsted-Lowry acid, a Bronsted-Lowry base, or neither. Arrange the species in the given reaction as conjugate acid-base pairs. HP...
Given that NO_2^- is a stronger base than NO_3^-, which is the stronger acid among the nitric acid, HNO_3, or nitrous acid, HNO_2?
Identify the Bronsted-Lowry acid and base in the given reaction and group them into conjugate acid-base pairs. NH3+ HBr-- NH4+ + Br-
Account for the conjugate acid of the given species. ClO2-
Determine the conjugate acid of the given species. NH2-
Deduce the conjugate acid of the given species. AsO43-
Formulate the conjugate acid of the given species. I-
Find the conjugate acid of the given species. H2O
Devise the conjugate base of the depicted species. HOCH3
Formulate the conjugate base of the given species. PH4+
Determine the conjugate base of the mentioned species. HBr
Deduce the conjugate base of the given species. HS-
Give the conjugate base of the mentioned species. H2O
Give the product(s) in the mentioned acid-base reaction. Identify the conjugate acid-base pair. NH4+ + CH3COO-
Give the formula for an example chosen from the representative elements for an acidic oxide.
Write equations and designate conjugate pairs for the stepwise reactions in water of (a) H_2SO_4, and (b) H_2SO_3.
What is the conjugate base of propylamine?
Which of the following pairs of substances are not conjugates? a. NH_3 and NH_2^- b. HCl and H^+ c. HO^- and H_2O d. HSO_4^- and SO_4^{2-} e. HSO_4^- and H_2SO_4
What is the conjugate base for the acid HI? For what acid is Cl- the conjugate base? What is the conjugate base for the acid CH3NH3+? For what acid is H2PO4- the conjugate base?
Which one of the following pairs of species are conjugate acid base pairs? A) HCl, HBr B) HI, NaOH C) H3O+, OH- D) H3PO4, H2PO4^2- E) H2SO4, SO4^2-
Deduce the formula of the given conjugate acid of the given Bronsted-Lowry base. C5H5N
Assuming all of the hydronium ion (7.083 \times 10^{-3}) comes from this reaction, what is the concentration of conjugate base, ~[A^-~], in this system?
Compose the formula for the conjugate acid or base for the given species. OH
Determine the formula for the conjugate acid or base for the given species. CN
Deduce the formula for the conjugate acid or base for the given species. H3O+
Write the formula for the conjugate acid or base for the given species. HSO3-
Quinapril (trade name Accupril) is a drug used to treat hypertension and congestive heart failure. Which site is most basic?
What is the conjugate base of HIO4?
Which of the following is the strongest conjugate base? a) Aniline b) Pyrrolidine c) Ammonia
Which of the following is the strongest acid? a) Aniline b) Pyrrolidine c) Ammonia
Give the name and formula of the acid corresponding to each of the following oxyanions. a. selenite ion b. chlorite ion c. hypoiodite ion (IO-) d nitrate ion
Considering the species A-D answer the question. Which two species represent a conjugate acid-base pair?
For each pair of compounds: Which conjugate base is stronger?
For each pair of compounds: Draw the conjugate base of each acid.
Give the conjugate base to each of the following species regarded as acids: a. H2S b. HNO2
What are the two acids in the following reaction? NH4+(aq)+ HPO{-} <->NH3 + H2PO4-
The pKa of three CH bonds is given below. For each compound, draw the conjugate base, including all possible resonance structures.
What is the conjugate base of the given A?
What is the conjugate acid of the given A?
Why is the pKa of the Ha protons in 1-acetylcyclohexene higher than the pKa of the Hb protons?
Suppose you're doing a research project with some thermophilic bacteria, which can live and even thrive in very hot, acidic environments. You place a culture of these bacteria in 250.0 mL of a buff...
Identify the conjugate acid of each of the following species: (a) SO_4^{-2} (b) OH^-
Identify the conjugate base of each of the following compounds: (a) HNO_2 (b) HCIO
What is the pH of a buffer composed of 0.35 M H2PO4 (aq) and 0.65 M HPO4 (aq)? ka of H2PO4 is 6.2 x 10^-8.
Which of the following is not an acid-base conjugate pair? (a) H2S and OH- (b) H2CO3 and HCO3- (c) NH4+ and NH3 (d) H2O and OH- (e) none of the options
In the following reaction, which species is the conjugate acid? H2SO4 + H2O -----------> H3O+ + HSO4-
Write the net ionic equation for the following reaction and determine the conjugate acid-base pairs: NH_4Cl + Ba(OH)_2 = 2H_2O + BaCl + 2NH_3
Which proton in the following drug below is most acidic? THC is the active component in marijuana, and ketoprofen is an anti-inflammatory agent.
a Consider the hydrated aluminum ion as a Br nsted-Lowry acid. Write the chemical equation in which this ion loses a proton in a reaction with ammonia, NH3. Identify the conjugate acids and bases i...
Rank the given compounds in groups in order of increasing basicity.
Rank the given ion below in order of increasing basicity.
In the following reaction, identify the acid on the left and its conjugate base on the right. HNO_3 (aq) + NH_3(aq) leftrightarrow NH_4^+ (aq) + NO_3^- (aq)
Which acid has the strongest conjugate base? (a) HNO3 (b) HOCl (c) HOI (d) HI (e) H2SO4
Write the formula for the conjugate acid of each of the following: (a) F^-. (b) N_2H_4. (c) C_2H_5N. (d) O_2^2-. (e) HCrO_4^-.
Pick the stronger base from each of the following pairs. Part A) ClO- or ClO4- Part B) Cl- or H2O Part C) NO2- or ClO
Consider the following two acids and their K_a values: HF, K_a = 3.5 \times 10^{-4} HClO, K_a = 2.9 \times 10^{-8} List the the conjugate base of the acids. Which conjugate base is stronger? Ex...
Deduce the conjugate base of the acid.
Formulate the conjugate base of the acid.
Find the conjugate acid of the base.
Deduce the conjugate acid.
Determine the conjugate acid of the base.
What is the conjugate acid of the given base?
Methadone, a narcotic analgesic, is dispensed as its hydrochloride salt. Explain the use of salt rather than the amine.
PO_4^3- is the formula for the conjugate acid of HPO_3^2-. a. True. b. False.
Figure out the conjugate base for the compound below (the acidic hydrogen in each case is marked with an *).
Produce the conjugate base for each compound below at the marked acidic hydrogen
Draw the conjugate base for each compound below (the acidic hydrogen in each case is marked with an *).
Which of the following conjugate acid-base pairs should you choose to prepare a buffer solution that has pH = 4.5? (a) HSO_4^- and SO_4^{2-} (b) HOCl and OCl^- (c) C_6H_5CO_2H and C_6H_5CO_2^-
What is the connection of ants' use of formic acid and trees?
Which has the strongest conjugate base? Lactic acid and Propionic acid.
Which has the strongest conjugate base? Cyanic acid and Formic acid.
Sodium acetate is a conjugate base of the organic acid, acetic acid. If you add some sodium acetate to a mixture of diethyl ether and water, which liquid would you expect the sodium acetate to diss...
Indicate whether the specie is an acid or base in water. Give the formula for its conjugate base or acid NH_4^+.
Determine whether the following salt solution will produce a basic solution: KI.
Give the formula of the conjugate acid of O^2-
Explain why the conjugate acid of NH2CO2H is correctly written with the H attached to the O double-bonded to C and not to the N.
Note whether hydrolysis occurs for the following ion. If hydrolysis does occur, write the chemical equation for it. Then write the equilibrium expression for the acid or base ionization (whichever...
Draw the conjugate base of methylamine.
Identify the most acidic hydrogens in each of the following molecules: (a) CH3CH2CHO (b) (CH3)3CCOCH3 (c) CH3CO2H (d) Benzamide (e) CH3CH2CH2CN (f) CH3CON(CH3)2
High-purity benzoic acid (C_6H_5COOH; Delta H_rxn for combustion = -3227 kJ/mol) is used as a standard for calibrating bomb calorimeters. A 1.221 g sample burns in a calorimeter (heat capacity = 13...
Rank the conjugate bases of the following group of acids in order of increasing basicity. CH_2=CH_2, HC triple bond CH, CH_4
Which compounds could be used with their conjugates to make a buffer solution? a. NH_3(aq) b. H_2CO_3 c. KI d. H_2SO_4 e. H_2S f. CH_3COOH
True or False: CH_3CH_3 is the conjugate acid of CH_3CH_2^-
Treatment of (HOCH2CH2CH2CH2)2CO with acid forms a product of molecular formula C9H16O2 and a molecule of water. Draw the structure of the product and explain how it is formed.
Draw the conjugate bases of pyrrole and cyclopentadiene. Explain why the sp3 hybridized C-H bond of cyclopentadiene is more acidic than the N-H bond of pyrrole.
The conjugate base of hydrofluoric acid dissolved in water is: a) F- b) OH- c)H3O+ d) HF e) F2
What is meant by the conjugate acid of a base?
The reaction of tetrafluoroboric acid with the acetate ion results in the formation of tetrafluoroborate ion and acetic acid where acetic acid is favored. Which is the weaker base, tetrafluoroboric...
Which of these acid and base pairs do not form a buffer in solution? \\ Group of answer choices HF/F- H3PO4/H2PO4- H2SO4/HS- HCOOH/HCOO- HNO3/NO3-
Which one of the following solutions would have the lowest pH? Explain. a. Al_2(NO_3)_3(aq) b. Ca(NO_3)_2(aq) c. KNO_3(aq) d. Mg(NO_3)_2(aq) e. Zn(NO_3)_2(aq)
Determine the conjugate acid and base for the reaction below: CH_3CH_2OH + H_2SO_4
Which is the conjugate base of the HSO3- ion? a. HS- b. S2- c. SO32- d. SO42-
Which is the conjugate acid of HPO42-? a. H3O+ b. H2PO4- c. H3PO4 d. PO43-
The benzylammonium ion (C_6H_5CH_2NH_3^+) has pK_a = 9.33, and the propylammonium ion has pK_a = 10.71. a. Which is the stronger base, benzylamine or propylamine? b. What are the pK_b's of benzylam...
Complete the following reaction. nitric acid + sodium sulfide
If the pKa of an acid, HX, is 4.40, what is the pH of a 0.10 M solution of NaX?
Given (NH_4)_2SO_4(aq) + Ca(OH)_2(aq) to 2NH_3(g) + CaSO_4(s) + 2H_2O(l), how many molecules of NH_3 will be produced from 10.0 mol of Ca(OH)_2 in an excess of ammonium sulfate? a) 1.20 x 10^-25 mo...
Calculate the pH of a 1.20 M solution of a weak monoprotic acid with Ka = 5.89 x 10-5.
Predict whether the solution of the following will be acidic, basic, or neutral, and explain the answer. (a) KCN (b) CH_3COONH_4
Calculate the H3O+ in a 1.4 M solution of hypobromous acid. (Ka = 2.0 x 10-9)
In the following reaction, label the acid, base, conjugate acid, and conjugate base. KC_2H_3O_2 (aq) + HCN(aq) to HC_2H_3O_2 (aq) + KCN(aq)
Give the conjugate acid of S^{2-}. Write it ignoring super and subscripts (so, HPO_4^{2-} would be HPO42-).
What is the conjugate base of HOCl?
(a) What is the most stable conjugate acid of caffeine? (b) Why?
Are C2H3O2- and HC2H3O2 a conjugate acid-base pair? Explain.
Are H2SO3 and HSO3- a conjugate acid-base pair? Explain.
Identify each of the following as a Bronsted acid, base, both, or neither. (a) HI (b) CH_3COO^- (c) H_2PO_4^- (d) HSO_4^-
Are H2O and H2O2 a conjugate acid-base pair? Explain.
Are NaF and F- a conjugate acid-base pair? Explain.
Calculate the H+ in a solution that is made by mixing exactly 500 mL of 0.173 M NaOH with exactly 500 mL of 0.100 M CH3COOH. (Ka = 1.8 x 10-5)
Determine the pH of a 0.24 M solution of pyridinium nitrate (C_5H_5NHO_3) at 25^\circ C. Pyridinium nitrate dissociates in water to give pyridinium ions (C_5H_5NH^+), the conjugate acid of pyridine...
Hydrofluoric acid (HF) is a highly toxic acid that is used in etching glass (K_a = 6.76 times 10^{-4}). What is the pH of a solution of a 0.137 M NaF, the conjugate base of HF?
Which of the following pairs lists an acid followed by its conjugate base? (Select all that apply.) (A) H_3O^+, H_2O. (B) HCOOH, HCOO^-. (C) NH_3, NH_4^+. (D) H_2CO_3, CO_3^{2-}.
Are HNO3 and HNO2 a conjugate acid-base pair? Explain.
Are HClO4 and ClO3- a conjugate acid-base pair? Explain.
Are HSO4- and SO42- a conjugate acid/base pair? Explain.
Are HIO4 and IO4- a conjugate acid-base pair? Explain.
What is the conjugate acid of diethylamine?
What is the conjugate base of hydrocyanic acid?
A student prepared a 0.10 M solution of formic acid and found its pH at 25 degrees Celsius to be 2.38. Calculate Ka for formic acid at this temperature.
Write the formula of the conjugate acid for the base C6H5NH2.
In the following reaction, which are the Bronsted-bases? CN^- + H_2O rightarrow HCN + OH^- a. CN^- and HCN b. H_2O and OH^- c. CN^- and OH^- d. H_2O and HCN e. H_2O, HCN, and OH^-
Write the conjugate acid for the reaction of NH_3 with H_2O.
The pH of a 0.250 M cyanuric acid solution is 3.690. What is the value of Ka?
What is the formula for the conjugate acid of HSO4-?
What is the formula for the conjugate base of HBr?
Calculate the pH of an aqueous solution of 0.15 M NaCN.
Calculate the OH- of a solution with H3O+ = 9.27 x 10-9 M at 25 degrees Celsius.
Consider the titration of 50.0 mL of 0.150 M HCl with 0.150 M NaOH. What is the pH of the solution before any NaOH has been added?
Identify which reactant is the Bronzed-Lowry acid and which is the Bronzed-Lowry base in the following reaction. HCl(g) + NH3(g) arrow NH4Cl(s)
Are HCl and Cl- a conjugate acid-base pair? Explain.
Are H2CO3 and CO32- a conjugate acid-base pair? Explain.
Are H3O+ and OH- a conjugate acid-base pair? Explain.
Draw the conjugate acid for the following base. Remember to include charges and non-bonding electrons where necessary. H_2PO_4^-
Rank the conjugate bases from most stable to least stable. To rank items as equivalent, overlap them. CH_3COO^-, CH_3CONH^-, FSO_3^-, CH_3SO_2^-, CH_3SO_3^-
What happens to a weak acid when it donates a proton? a. it becomes positively charged b. it becomes negatively charged c. it becomes neutral
Draw the structure of the conjugate acid of acetone (CH_3COCH_3).
The following is a list of weak acids and their Ka values. HOCl hypochlorous acid 3.5 10 8 H2S hydrogen sulfide 1.1 10 7 HCN hydrocyanic acid 4.0 10 10 HNO2 nitrous acid 4.5 1...
Identify the conjugate acid of SO42- in the following reaction. CO32- + HSO4- arrow HCO3- + SO42-
In the laboratory, you are given the task of separating Ca2+ and Ba2+ ions in aqueous solution. Can the reagent HCl be used for this process? If so, write the formula of the precipitate.
Consider the reaction HNO_2 (aq) + H_2O (l) to H_3O^+ (aq) + NO_2^- (aq). Find the species is a conjugate base?
Write the equations that represent the first and second ionization steps for hydrotelluric acid (H_2Te) in water. (Use H_3O^+ instead of H^+.)
Draw the structure of protonated aniline (anilinism ion) and its conjugate base aniline.
Draw the structure and its conjugate base for 3-Hydroxypropanoic Acid.
Draw the structure and its conjugate base for Phenol.
Draw the structure and its conjugate base for tert-Butanol.
Draw the structure and its conjugate base for Carbonic Acid.
Draw the structure and its conjugate base for Butyl Ammonium.
Draw the structure and its conjugate base for Decanoic acid.
Find the approximate pK_a value for Decanoic acid.
Show the reaction that represents forming a conjugate base from HPO_4^{2-}. What are the K_b and pK_b?
Find the conjugate base for HPO_4^{2-}.
What is the pH of a 0.50 M HC6H5O solution?
Is a solution with a pH of 8.28 acidic or basic? Explain.
Calculate the H+ of an aqueous solution with pH = 1.51.
Calculate the pH of a 0.0147 M aqueous solution of methylamine (Kb = 4.2 x 10-4) and the equilibrium concentrations of the weak base and its conjugate acid.
Calculate the pH of a 0.543 M aqueous solution of benzoic acid (Ka = 6.3 x 10-5) and the equilibrium concentrations of the weak acid and its conjugate base.
Calculate the frequency of light with a wavelength of 4.5 x 10-7 m.
The concentration of C_5H_5NH^+ is 1.8 \times 10^{-5} M in a 0.25 M C_5H_5N solution at 25^\circ C and the concentration of C_6H_5NH_3^+ is 1.2 \times 10^{-4} M in a 0.25 M C_6H_5NH_2 solution at 2...
What is the approximate pH of a solution labeled 0.050 M HClO? a) 5.1 b) 3.9 c) 4.4 d) 2.1 e) 7.6
List the steps on how to prepare a 1/100 dilution (of a concentrated stock solution) with a final volume of 87 mL.
Rank the following from weakest to strongest acid. (a) HF (pK_a = 3.45) (b) HCN (pK_a = 9.31) (c) CH_3CO_2H (pK_a = 4.75) (d) HNO_2 (pK_a = 3.37) (e) HClO_2 (pK_a = 2.00)
Given the balanced reaction below, identify the weak acid and its conjugate base. H2CO3(aq) + H2O(l) arrow HCO3-(aq) + H3O+(aq)
Identify the acid-base pairs in the equilibrium reaction. HCO_3^- (aq) + H_2O (l) rightleftharpoons CO_3^{2-} (aq) + H_3O^+ (aq)
An enzyme-catalyzed reaction was carried out in a 3.5 M blood buffer. As a result of the reaction, 0.02 M of diprotic acid was produced, pK_a of the buffer is 7.1. Write the conjugate-base of the i...
Pyridine is a weak base that is used in the manufacture of pesticides and plastic resins. It is also a component of cigarette smoke. Pyridine ionizes in water as follows: C5H5N + H2O rightarrow C5...
Find the acid or base for NO_3^-.
Find the acid or base for N_3^-.
Find the acid or base for NH_3.
Find the acid or base for PO_4^{3-}.
Explain whether ethanol can be oxidized to a carbolic acid?
Acid chlorides are more reactive that aldehydes; aldehydes are more reactive than ketones; ketones are more reactive than esters; esters are more reactive than amides. Does this reactivity trend co...
Lemon juice contains citric acid with a concentration of approximately 0.30 M (around 6% by mass), giving rise to its acid properties. Citric acid is generally considered a triprotic acid (capable...
Classify the compound given as a strong acid, weak acid, strong base, or weak base. CsOH
Draw the conjugate base of any one of the following strong acids: nitric acid, perchloric acid, sulfuric acid.
Identify the acid-base conjugate pairs in the following reaction. NH4+(aq) + HCO3-(aq) arrow NH3(aq) + H2CO3(aq)
What are the conjugate acid and conjugate base of the bicarbonate ion, HCO3-?
Write the name and formula of the acid that is formed from the selenide ion.
What is the name and formula of the acid that is formed from the BrO3- anion?
What is the name and formula of the acid that is formed from the bromite anion?
Draw the structure of the organic product formed by heating succinic acid. HOOCCH_2CH_2COOH to
True or false? In a water solution, acids form hydrogen ions (H+) while bases form hydroxide ions (OH-).
Which of the following represents a Bronsted-Lowry conjugate acid-base pair? a) SO3{(2-) and SO2 b) CO3(2-) and CO c) H3O and H2 d) NH4+ and NH3
When equal volumes of 0.292 M aqueous hydrocyanic acid and sodium hypochlorite are mixed, will the pH of the resulting solution be less than 7, greater than 7, or equal to 7?
Are H3PO4 and PO43- a conjugate pair? Explain.
What is the pK_b of NO_2^-? K_a of nitrous acid is 7.1 \times 10^{-4}?
Nitrous acid, HNO_2, has a Ka of 4.00 x 10^(-3). Give the formula for the conjugate base of HNO_2 and give the value of Kb for that conjugate base.
Name and write the formula of the ion that makes a solution acidic.
What is the conjugate acid of HPO32-?
Nitrous acid (HNO2) is a weak acid. Identify the conjugate base of HNO2.
Is H2SO4 an acid or a base? Identify its conjugate acid or base.
True or false? The conjugate base of a strong acid readily reacts with water.
Give a brief definition of a conjugate acid and provide an example.
Which set is a conjugate acid/base pair? a. HNO3/ NO2^- b. HNO2 /NO3^- c. HSO3^-/SO4^{2-} d. HSO3^-/SO3^{2-}
Identify the conjugate base of the compound HSO4-.
Identify the conjugate base of the compound HCO3-.
What is the conjugate acid of HC6H5O72-?
Give the conjugate acid of the base ClO4-.
Give the conjugate acid of the base OH-.
Give the conjugate acid of the base NH2-.
Give the conjugate acid of the base CN-.
Write the formula for the conjugate base for trifluoracetic acid.
What is the name of the acid HNO2? a. nitrate acid b. nitrite acid c. nitrous acid d. nitric acid e. hydronitrogen acid
What is the formula for the conjugate acid or base of F-?
Use the References to access important values if needed for this question. K, for hydrocyanic acid, HCN, is 4.00 \times 10^{-10} \\K, for phenol (a weak acid), C_6 H_5OH is 1.00 \times 10^{-10} \\...
Draw the conjugate acid and conjugate base of the molecule below.
Rank the conjugate bases from most stable to least stable. To rank items as equivalent, overlap them. a. CH_3COO^-. b. CH_3CONH^-. c. FSO_3^-. d. CH_3SO_2^-. e. CH_3SO_3^-.
Pick the stronger base from each of the following pairs. a) F^{-} or Cl^{-} b) C N^{-} or F^{-}
Give the formula for the acetate ion.
If you make up a solution of 100 mL of 0.15 HEPES in the basic form, what will be the pH?
What is the conjugate acid of hydrogen chromate, HCrO_4?
The stronger the acid, A) the stronger the conjugate acid. B) the stronger the conjugate base. C) the weaker the conjugate base. D) the weaker the conjugate acid. E) none of the above.
Give the conjugate acid for each compound below. a. HSO_4^-. b. CO_3^{2-}. c. NH_3.
Determine the net Bronsted acid-base equation for the reaction that occurs when aqueous solutions of HClO4 and NaH2PO4 are mixed.
In the following reaction, identify the weak acid and weak base and then give the conjugate acid and conjugate base. H2O(l) + NH3(aq) arrow
Write the formula for the conjugate acid of the base NH2CH3.
Write the formula of the conjugate acid of each of the following bases.a) NH_3 b) Cl O_2^{-} c) SO_4^{2-} d) OH^{-}
Write the formula of the conjugate base for the following. HC_4H_7O_2
Write the formula of the conjugate base for the following. C_6H_5NH_3^+
Write the formula of the conjugate base for the following. HClO_4
Is a 0.1 M solution of NaCN acidic, basic, or neutral? If it is not neutral, explain your choice by writing a balanced net ionic equation to describe its behavior in water.
The pKb values for the dibasic base B are pKb1 = 2.10 and pKb2 = 7.51. Calculate the pH after the addition of 100.0 mL of HCl in the titration of 50.0 mL of a 0.55 M B(aq) solution with 0.55 M HCl(...
True or false? Potassium tert-butoxide will deprotonate methylacetylene.
Which of the following is the weakest acid? a. Cl3CCOOH b. CH3COOH c. CH3CH3 d. CH3OH
What is the conjugate acid of nitromethane (CH3NO2)?
What is the pH of 40.0 mL of a solution that is 0.13 M in CN?
What is the conjugate acid of the Bronsted-Lowry base CN-?
What is the conjugate base of the Bronsted-Lowry acid HPO42-?
The conjugate acid of HSO_4^- is _____. a. OH^-. b. SO_4 ^{2-}. c. H_2SO_4. d. H_2O. e. H_3O^+.
Assuming equal initial concentrations of the given species, which of the following weak acids has the strongest conjugate base in an aqueous solution? a. Acetic acid, K_a = -1.8 times 10^{-5}. b. F...
Write the formula and name of the conjugate acid or base of CH3COOH.
Write the formula and name of the conjugate acid or base of NH3.
Write the formula and name of the conjugate acid or base of HI.
Write the formula and name of the conjugate acid or base of ClO3-.
Write the formula for the conjugate base of each of the following. (a) N H 3 (b) H P O 3 4 (c) H 3 O + (d) H C O 3 (e) P H 3
Write the formula for the conjugate acid of each of the following. (a) N H 3 (b) H S O 4 (c) C 2 O 2 4 (d) H 2 P O 4 (e) H S
In the following reaction, what does water act as? HCl + H2O arrow H3O+ + Cl- a. a Lewis acid b. a Bronsted acid c. an oxidizing agent d. a Bronsted base
What are the conjugate acid-base pairs in the following reaction? NH3(aq) + H2Se(aq) arrow HSe-(aq) + NH4+(aq)
Rank these acids according to their expected pK_a values (from the highest pK_a to the lowest pK_a). CH_3CH_2COOH ClCH_2COOH Cl_2CHCOOH ClCH_2CH_2COOH
What is the conjugate acid of the base CH3CH2-?
What is the conjugate acid of the base NH2-?
What is the conjugate acid of the base H2O?
What is the conjugate acid of the base HSO4-?
What is the conjugate base of the acid H3O+?
What is the conjugate base of the acid CH3OH?
What is the conjugate base of the acid NH3?
What is the conjugate base of carbonic acid, H2CO3?
Write the formula for the conjugate acid of C5H5N.
Write the formula for the conjugate acid of CH3NH2.
Write the formula for the conjugate acid of F-.
Write the formula for the conjugate acid of the following base: Cl- (Express your answer as a chemical expression.)
Consider the reaction HC2H3O2(aq) + H2O(l) rightarrow H3O+(aq) + C2H3O2-(aq). Which species is the conjugate acid? a) HC2H3O2(aq) b) H2O(I) c) H3O+(aq) d) C2H3O2-(aq) e) two of these
Write the formula of the conjugate acid for each of the following bases? a) SO_4^{2-} b) CN^- c) CH_3-CH_2-COO^- d) ClO_2^- e) HS^-
Draw the Lewis structure for the conjugate base from the reaction of ethanol with a generic base. Include all lone pairs of electrons and any nonzero formal charges.
Draw the Lewis structure for H3O+. For this molecule, determine the molecular geometry, electron domain geometry, bond angles, and hybridization about the central atom.
The hydrogen oxalate ion HC_2O_4^- is amphiprotic. Write a balanced chemical equation showing how it acts as an acid toward water. Express your answer as a chemical equation. Identify all of the ph...
True or false? The conjugate base of HBrO is BrO+.
a) Write a balanced equation to represent the dissociation of ethanoic acid. b) Calculate the pH of a 0.10 mol/dm3 solution of ethanoic acid.
What is the Ka reaction of HCN?
Given that Kb for (CH3)2NH is 5.4 times 10^(-4) at 25 degree C, what is the value of Ka for (CH3)2NH2+ at 25 degree C?
Given that Ka for HBrO is 2.8 times 10^(-9) at 25 degree C, what is the value of Kb for BrO- at 25 degree C?
Is NH_4ClO_4 acidic, basic, or neutral? Explain.
Give the conjugate base for each compound below. a. H2SO4 b. HCO3- c. NH4+
Is pentanoic acid classified as an aldehyde, a ketone, or neither? Explain.
What is the conjugate base for HNO3?
What is the conjugate acid of CH3NH2?
What is the conjugate base for H2PO4-?
What are the toxic effects of ingesting oxalic acid?
Write the formula of the conjugate acid for OH-. What is its name?
Write the formula of the conjugate acid for SO42-.
In the following reaction, identify each species as an acid or a base. In addition, clearly indicate the conjugate acid-base pairs. OH-(aq) + Al(H2O)63+(aq) arrow H2O(l) + Al(H2O)5OH2+(aq)
Which acid has the stronger conjugate base: NH4 or HF? Explain.
A beaker containing 105 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M . A student adds 7.90 mL of a...
What is the conjugate acid of the bromide ion?
A beaker with 130 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.20 mL of a 0.370...
A 0.10 M solution of which of the following salts is the most basic? a) NH4F b) NH4NO2 c) NH4C2H3O2 d) NH4OCl e) NH4CN
Identify the conjugate base of CH3COOH in the following reaction. CH3COOH + HSO4- arrow H2SO4 + CH3COO-
What are the differences between lactic acid and lactate? Is lactic acid derived from lactate? Give some examples of where and when these two chemicals are formed.
H F is a stronger acid than N H + 4 . Which base would be stronger: F or N H 3 ? (a) Both bases would be equal in strength. (b) Cannot tell from the information given. (c) F (d) Neith...
Which one of the following pairs of acids and their conjugate bases is incorrectly matched? (a) H F , F (b) H 3 O + , H 2 O (c) N H + 4 , N H 2 (d) H 2 O , O H (e) H C l O , C l O
Which of the following would not be more soluble in 1.0 M HNO_3 than in pure water? (a) PbI_2 (b) Mg(OH)_2 (c) BaCO_3 (d) CaC_2O_4 (e) FeS.
Is an aqueous solution of Ba(NO_3) acidic, neutral, or basic? Explain.
Which of the following is not an acid-base conjugate pair? (a) H C l O , C l (b) H F , F (c) H N O 2 , N O 2 (d) H 2 C O 3 , H C O 3 (e) N H + 4 , N H 3
Explain how the structural features of acids (A-H) can be used to predict their relative strengths.
What is the difference between a conjugate acid and base?
True or false? A Bronsted-Lowry base acts as a proton donor.
Alpha hydroxy acids: A. Break down and lift off part of the top layer of dead skin cells. B. Accelerate growth of living cells. C. Are classified as cosmeceuticals. D. All of the answers apply.
Which two species in the following reaction represent an acid and its conjugate base? HSO4-(aq) + HPO42-(aq) arrow SO42-(aq) + H2PO4-(aq)
The conjugate base of H2PO4-(aq) is: a) H3P(aq) b) PO43-(aq) c) H3PO4(aq) d) HPO42-(aq)
As base strength decreases, the strength of the conjugate acid (a) decreases. (b) increases. (c) may increase or decrease. (d) remains constant.
The chemical name for ClO3- is chlorate ion. There, what is the name of HClO3?
What is the conjugate base of HF?
What is the conjugate acid for the following base? CH3CH2OH
What is the conjugate acid of HPO42-?
For the equilibrium CH3NH3 + H2O arrow CH3NH2 + H3O+, what two substances are bases?
Why does steel not react with either strong or weak acids? Is it because it's an alloy? Explain.
Which of the following are conjugate acid-base pairs? Which are not? (a) H 2 S O 3 / S O 2 3 (b) H 2 P O 4 / P O 3 4 (c) H S O 4 / S O 2 4
Identify the conjugate acid of H2O from the following equation. HCl + H2O arrow H3O+ + Cl-
Explain the following statement: "A strong acid has a weak conjugate base, whereas a weak acid has a relatively strong conjugate base."
Is HClO_4 a strong or weak acid?
What are alkalimetry and acidimetry?
What formula do you use to determine if an acid is protonated or deprotonated when given the pH and pKa?
What is the pKa of hexa-1,3-dien-1-ol and 1-hexanol?
Calculate the concentration of all species in a 0.155 M solution of H2CO3.
What is the conjugate acid of water? a. H_2O (l) b. H^+ (aq) c. H_3O^+ (aq) d. {O_2}^- (aq) e. OH^- (aq)
What is the conjugate base of {HSO_4}^-? a. {SO_4}^{2-} b. H_2SO_4 c. H_2SO_3 d. H3O^+ e. OH^-
In the reaction HSO4- + HS- arrow H2S + SO42-, what is a conjugate acid-base pair?
What is the formula for the conjugate acid of C_2O_4^{2-}?
Explain how bicarbonate and carbonate are related.
Write the formula for the conjugate base of HSeO3-.
Write the formula for the conjugate base of (CH3)2NH2+.
The complementary base (base pair) of the conjugate acid H 3 O + is: a. O H b.. H 2 O c. H 2 O + d. H 4 O 2 + e. HCOO
What is the conjugate acid of HS- in the following equation? H2S + H2O arrow HS- + H3O+
What are conjugate bases and acids? Give some examples.
Discuss the development process of Fusidic acid concentrating on one or two dosage forms. This could include research into the experimental work that a scientist may conduct to develop a medicinal...
Draw conjugate acid for the base CH3CH2OH and include charge and non bonding electrons.
The conjugate base of methyl alcohol is: a) hydroxyl ion. b) methyl radical. c) hydronium ion. d) methoxide ion.
Write the formula of the conjugate acid of each of the following bases: a. Nh3 b. ClO2- c. SO4 2- d. OH-
Does 2-methylcyclobutene undergo acid catalyzed hydration to give 2-methylcyclobytan-2-ol?
When acid dissolves in water: (a) Hydrogen ions are released (b) Carbon dioxide is released (c) Oxygen is released (d) OH ions are released (e) None of the choices are correct
Write the formula for the conjugate acid or base for each of the following: a. H S O 3 b. H 3 O + c. C N d. O H
Identify the acid (A), base (B), conjugate acid (CA), and conjugate base (CB) in reaction: HSO_4^- (aq) + CIO^- (aq) \rightleftharpoons HCIO (aq) + SO_4^{2-} (aq)
How can you tell which compound is an acid and which is it's conjugate base in a reaction? Also, how can you tell whether it is strong or weak?
In the equation H F + H 2 O H 3 O + + F , (a) H 2 O is a base and H F is its conjugate acid. (b) H 2 O is an acid and H F is the conjugate base. (c) H F is an acid and F is it...
Rank the acidity of the following. a. PhCH2OH b. PhOH c. PhCO2H
Draw conjugate base of meldrum's acid and use inductive and resonance arguments to explain why it might be such a strong acid.
The conjugate base of which of the following makes the strongest base? A. H3C-CH2OH B. HC=CH C. H3C-CH3 D. H2C=CH2 E. H2O
For the following reaction: H_2CO_3 (aq) + OH^- (aq) leftrightarrow H_2O (l) + HCO_3^{4} (aq) The conjugate acid is: (a) H_2CO_22 (b) OH (c) H_2O (d) HCO_3^4
Which of the following is an example of a Bronsted-Lowry acid-base conjugate pair? a. CuCl2, CuCl b. NH4+, NH3 c. H3O+, Br- d. CH3CO2H, OH-
What is the relationship between the Ka of a weak acid and the Kb of its conjugate base?
What is the conjugated base of CH3CH2OH?
State with two examples (on each), how a strong and weak acid/base relate to its conjugate acid/base pairs.
What is the conjugate acid of NH_3?\\ A.\ OH^-\\ B.\ H_3O^+\\ C.\ NH_2^-\\ D.\ NH_4^+
Dimedone is soluble in water and acts as a weak acid in water. With a pKa of 5.23, it is almost as strong an acid as a typical carboxylic acid. Write an equation for the acid-base reaction of dimed...
Choose the case that is not a Bronsted conjugate acid-base pair. a. NH3, NH4+ b. C2O42-, HC2O4- c. HC2H3O2, H2C2H3O2+ d. O2-, OH- e. SO32-, SO42-
According to the Bronsted-Lowry definition, a base is \\ a. a substance that increases the hydroxide ion concentration in water b. a substance that can accept a proton from an acid c. a substanc...
Choose the case that is not a conjugate acid-base pair. \\ a.\ HCO_3^-,\ CO_3^{2-}\\ b.\ H_3O^+,\ H_2O\\ c.\ OH^-,\ O_2^-\\ d.\ H_3PO_4,\ HPO_4^{2-}\\ e.\ NH_2OH_2^+,\ NH_2OH
Which of the following is a conjugate acid-base pair? \\ a.\ HCl/OCl^-\\ b.\ H_2SO_4/SO_4^{2-}\\ c.\ NH_4^+/NH_3\\ d.\ H_3O^+/OH^-
True or false? Water is the conjugate base of the hydroxide ion.
Name each acid. a.) H F ( a q ) b.) H N O 3 ( a q ) c.) H 2 C 2 O 4 ( a q )
what are the names and formula of the conjugate acids of the following: a) HSO_3^- b)Br^- c)H_20 d)HNO_2 e)NH_3
Write the conjugate acid of: a. Nitrite ion b. Nitrate ion c. Sulfate ion d. Bicarbonate ion
Which of the following does not represent a conjugate acid/base pair? (I) H_2CO_3 and KHCO_3 (II) CH_3COOH and CH_3CO_2 (III) H_3PO_4 and Na_2HPO_4 (IV) Mg(OH)_2 and Mg(NO_3)_2 (a) I and II (...
The conjugate base of HC_2O_{4-} is (a) H_2C_2O_4 (b) HC_2O_4^- (c) C_2O_4^{2-} (d) NaHC_2O_4
If you achieve the conjugate base of an amide, will it be a particularly strong conjugate base considering the stability of most amides?
If H_2O acts as an acid in a reaction, what would be its conjugate base?
Identify the Bronsted-Lowry acid and base conjugate pairs for each of the following equations: a) HNO_3 + OH^- \longrightarrow H_2O + NO_3 b) CH_3NH_2 + H_2O \longrightarrow OH^- +CH_3NH_3...
The formula for the conjugate base of HSO_3^- is {Blank}.
Which of the following is the conjugate base of H 3 P O 4 ? (a) H P O 2 4 (b) P O 3 4 (c) H 2 P O 4 (d) both H 2 P O 4 and H P O 2 4
.Give the conjugate base of HS-. Write it ignoring super and subscripts (so, HPO42- would be HPO42-)
Predict the conjugate base of the following: \\ a.\ NH_4^+\\ b.\ H_2O\\ c.\ H_2PO_4
Choose the answer that fills in the blanks properly in the following statement: The strong acid used in this experiment is hydrochloric acid, HCl, its conjugate base is [{Blank}], a [{Blank}] base.
Give the conjugate bases of the following: (a) HS^(-1) (b) H2PO4
Write the chemical formula for the conjugate acid of the napthylamine, C_{10}H_{9}N. (Enter the elements in order: C, H, N, O.)
Write the chemical formula for the conjugate base of the hydrofluoric acid, HF.
Write the chemical formula for the conjugate acid of the amide ion, NH_2.
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