Describe how to find the % by mass of water in the hydrate CuSO4 cdot 5H2O assuming that the...
Question:
Describe how to find the % by mass of water in the hydrate {eq}CuSO_4 \cdot 5H_2O {/eq} assuming that the formula is not yet known. Be specific and list the laboratory procedural steps to take.
Mass Percent and Ratio:
The percent by mass is a percentage that shows how much the mass of a certain component of a compound or mixture accounts for the entire mass of that compound or mixture. The percentage can be expressed as a mass ratio by dividing the mass percent by one hundred.
Answer and Explanation: 1
Become a Study.com member to unlock this answer! Create your account
View this answerThe first step is to weigh the hydrate using a balance and record the mass of the hydrate.
The second step is to put the hydrate in a crucible and...
See full answer below.
Ask a question
Our experts can answer your tough homework and study questions.
Ask a question Ask a questionSearch Answers
Learn more about this topic:

from
Chapter 9 / Lesson 7What is percent composition? Learn how to find the percent composition of compounds. See how to determine the empirical formula from percent composition.
Related to this Question
- When separated from a water solution, CuSO4 forms a hydrate with 5 water molecules per formula unit. If 45 grams of anhydrous CuSO4 are dissolved in water, what mass of the hydrate could be recovered from the solution?
- 3.05 g hydrated copper sulfate produces 1.94 g of anhydrous salt. Assuming complete removal of all water of crystallization, determine the formula of hydrated copper sulfate.
- A 3.05 g of hydrated copper sulfate produces 1.94 g of anhydrous salt. Assuming complete removal of all water of crystallization, determine the formula of hydrated copper sulfate.
- 3.05 g of hydrated copper sulfate produces 1.94 g of anhydrous salt. Assuming complete removal of water of crystallization, determine the formula of hydrated copper sulfate.
- Determine the water content of the following: a) CuSO4 with 5H2O b) CuSO4 with 2H2 C) CuSO4 with 10H2O
- Anhydrous CuSO_4 can be used to dry liquids in which it is insoluble. The CuSO_4 is converted to CuSO_4.5H_2O, which can be filtered off from the liquid. What is the minimum mass of anhydrous CuSO_4 n
- Anhydrous CuSO4 can be used to dry liquids in which it is insoluble. The CuSO4 is converted to CuSO4 x 5H2O, which can be filtered off from the liquid. What is the minimum mass of anhydrous CuSO4 need
- In a laboratory setting, how would you determine if a compound was a hydrate?
- What is the formula of the hydrate of zinc sulfate, ZnSO4 + XH2O, if it decomposes to produce 43.9% water? Can you also calculate the value of X, which represents the water of crystallization? Show the steps to arrive at your answer.
- How can you prepare 250 mL of 2.00% (w/v) CuSO4 from CuSO4 5H2O?
- A hydrate of copper(II) sulfate was thermally decomposed to 0.7981 g CuSO4 and 0.5405 G of H20. Derive the value of X for the hydrate, CuSo4 XH20. (Assume CuSo4, 159.62 amu, H20, 18.02amu
- Predict the effect of each of the following by mass of water in the hydrate CuSO4 x 5H2O and the chemical of the hydrate. a. not heating the hydrate enough b. overheating the hydrate and producing som
- A mixture of CuSO4 5H2O and MgSO4 7H2O is heated until all water is lost. If 5.020 g of the mixture gives 2.988 g of the anhydrous salts, what is the percent by mass of CuSO4 5H2O in the mixture?
- A student is asked to prepare 250.0 mL of 3.5 M copper (II) sulfate from solid copper (II) sulfate pentahydrate. Describe how this solution should be made in the chemistry laboratory.
- Explain how you could make 100 mL of 0.50 mol/L CuSO4 by diluting part of the 0.100 mol/L.
- How can you make a CuSO4 5H2O saturated solution?
- A hydrate of zinc sulfate, ZnSO4 XH2O, decomposes to produce 43.9% water. Calculate the water of crystallization (X) and write the formula for the hydrate.
- When 25.0 g of copper (II) sulfate pentahydrate (bluestone) is heated, all the water of hydration is removed from the compound, leaving behind pure anhydrous copper (II) sulfate. What would its dehydrated mass (in grams) be?
- How do you prepare a 0.4 M soultion of copper sulfate in water starting with solid copper sulfate and water?
- When 20.9 g of copper (II) sulfate pentahydrate (bluestone) is heated, all the water of hydration is removed from the compound, leaving behind pure anhydrous copper (II) sulfate. What would its dehydrated mass (in g) be? The balanced chemical equation is
- A sample of CuSO_4 . 5H_2O was heated to 100 degrees C, where it lost water and gave another hydrate of copper(II) ion that contained 29.76% Cu. An 85.42-mg sample of this new hydrate gave 93.33 mg of barium sulfate precipitate when treated with a barium
- A 2.558 sample of sodium carbonate hydrate was heated to drive off the water, resulting in 0.948 g of anhydrous sodium carbonate. calculate the formula of the hydrate. Explain?
- When a 8.192 g sample of bluish-green crystals of hydrated nickel(II) sulfate is heated, all of the water of hydration is lost leaving 4.826 g of anhydrous nickel(II) sulfate. Write the formula of the hydrated crystal, showing the number of moles of water
- A different hydrate of Nickel(2) chloride, NiCl2. XH2O, decomposes to produce 45.5% water. Calculate the water of crystallization (X), and write the formula for the hydrate.
- Copper (II) sulfate pentahydrate can be heated to give you the anhydrous salt and water according to the following balanced chemical reaction: CuSO_4 cdot 5H_2O to CuSO_4+5 H_2O. lf 9.60 g of CuSO_4 are left after heating 15.01 g of the hydrated salt, cal
- Provide a brief procedure for determining the mass of water released upon heating approximately 1 gram of hydrated salt.
- In an experiment, a hydrate is heated to form an anhydrate. The masses of the before and after are measured and the percent of the water in the hydrate is calculated. If some of the hydrate spatters o
- A student performs a dehydration experiment and starts with 4.12 grams of hydrate. After heating the hydrate and allowing it to cool, the student weighs the anhydrous salt. The mass of the resulting anhydrous salt is 3.87 grams. How does it follow the law
- It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the water (dehydration). Write an equation that shows the dehydration of manganese(II) sulfate dihydrate
- What is the maximum mass of copper (II) sulfate pentahydrate, CuSO4 5H2O, which could be obtained by crystallizing the solution? Ar: H = 1; O = 16; S = 32; Cu = 63.5
- If the beaker was wet at the beginning of the experiment for the initial mass of the beaker, how would that affect the experimentally determined number of molecules of water in the hydrate?
- What is the molecular equation for the preparation of tetra-amino copper (II) sulfate hydrate, Cu(NH3)4SO4*H2O? In the experiment, CuSO4 5H2O was added to water and then ammonia solution was added to
- What is the expected mass of anhydrous salt formed after the waters of hydration of CoCl_2.6H_2O are driven off completely by heating, resulting in a mass loss of 2.000 g water?
- Dhar conducted a lab in which she had to calculate the number of moles of water heated off from copper sulfate. She first weighed copper sulfide in a beaker in order to get the amount needed to begin the heating of it. If the beaker was wet at the beginni
- A sample of CuSO_4.5H_2O was heated to 110 degrees C, where it lost water and gave another hydrate of copper(II) ion that contains 32.50% Cu. A 98.77-mg sample of this new hydrate gave 116.66 mg of barium sulfate precipitate when treated with a barium nit
- A few drops of water were added to a test tube containing 0.5 grams of anhydrous copper sulfate (CuSO4) and the following observations were noted. Anhydrous copper sulfate: light blue Anhydrous copper sulfate plus water: sky blue What can you conclude fro
- Describe how you can prepare crystals of copper(II) sulfate, starting with copper metal, without using concentrated sulfuric acid.
- List the following in order by the greatest percentage loss of mass upon heating to an anhydrous compound? Show your calculations to receive full credit. a. CuSO_4 5H_2O b. CaCI_2 2H_2O c. NaC_2H
- Determine the percent of water of crystallization in pure sample of green vitriol (FeSO_4.7H_2O).
- Is CuSO4 5H2O an efflorescent or desiccant substance?
- During heating of a hydrate, some solid was lost due to spattering.How would this affect the experimentally determined percent of water in the hydrate?
- A 4.0 g sample of the unknown hydrate was heated in a crucible for 5 minutes. The final weight of the sample was recorded as 2.9 g and it was completely decomposed to its anhydrous state. Determine which hydrate was used for the experiment: 1) calcium sul
- The hydration of anhydrous copper sulfate is represented by the following reaction: CuSO4 (s) + 5 H2O (l) \rightarrow CuSO4 5H2O (s) Select the best answer from the choices below. a. There is too little information to decide whether the reaction is exo
- A different hydrate of nickel II chloride NiCl2 x H2O decomposes to produce 45.5% water. Calculate the water crystallization x and write the formula for the hydrate.
- A student performs a dehydration experiment and starts with 4.12 grams of hydrate. After heating the hydrate and allowing it to cool, the student weighs the anhydrous salt. The mass of the resulting anhydrous salt is 3.87 grams. What is the mass of the wa
- When copper (II) sulfate pentahydrate ( C u S O 4 5 H 2 O ) is heated, it decomposes to the dehydrated form. The waters of hydration are released from the solid crystal and form water vapor.The hydrated form is medium blue, and the dehydrated solid is l
- How do the results of an experiment of empirical formula of a hydrate support specific fundamental chemical principles?
- The hydration of anhydrous copper sulfate is represented by the following reaction: *CuSO4 (s) + 5 H2O (l) --> CuSO4*5H2O (s) Select the best answer from the choices below. A) The hydration of anhyd
- A 4.00 g sample of a hydrate of nickel (III) bromide losses 0.793 g of water when heated. Determine the percentage of water in the hydrate and the formula of the hydrate.
- You have a tetrahydrate sulfate salt whose metal is unknown (XSO4*4H2O) and you are able to heat it until you get an anhydrous product. If you started out with 2.65 g of your hydrated salt and you obtained a weight of 2.03 g after hydration was completed,
- A 0.150 g sample of CuSO_4 * 5H_2O (s) is dissolved in water, and the solution is added to an excess of potassium iodide in water, and the following reaction occurs: 2 CuSO_4 * 5H_2O + 4 Kl --> 2 Cul
- Suggest a way to determine if colorless liquid in a beaker is water. How could an experimenter discover if there is salt dissolved in the water?
- Is the anhydrous portion of CuSO_4.5H_2O the CuSO_4?
- During an experiment, you drive water from the hydrate MxXy zH2O. You subsequently determine that your hydrate has six molecules of waters associated with each formula unit. However, the bottle the hy
- Epsom salts is a hydrated ionic compound with the following formula: MgSO_4 - xH_2O A sample of Epsom salts with a mass of 4.93 g is heated to drive off the water of hydration. The mass of the sample
- During your experiment, you drive water from the hydrate Mx + Xy arrow zH2O. You subsequently determine that your hydrate has four molecules of waters associated with each formula unit. However, the bottle the hydrate came from indicated a formula with on
- Both calcium sulfate and magnesium sulfate can form hydrates with water. Could white anhydrous CaSO4 or MgSO4 be substituted for anhydrous CuSO4? Why or why not?
- When 6.724 g of one of the hydrates of sodium sulfate (Na_2SO_4) was heated to drive off its water of hydration, the residue of anhydrous sodium sulfate has a mass of 2.964 g.
- A series of sulfate samples is to be analyzed by precipitation as BaSO_4. If it is known that the sulfate content in these samples ranges between 23% and 51%, what minimum sample mass should be taken to ensure that a precipitate mass no smaller than 0.206
- A sample of green crystals of nickel(II) sulfate heptahydrate was heated carefully to produce the bluish-green nickel(II) sulfate hexahydrate. a. What are the formulas of the hydrates? b. If 8.753 g of the heptahydrate produces 8.192 g of the hexahydrate,
- Explain how the organization of particles in a solid is different for an anhydrous ionic compound versus a hydrate.
- Determine which liquid is which, two blue solutions and two clear choices: CuSO4 Cu(NO3)2 NH4OH CaCl2
- Cobalt (II) Chloride is commonly obtained from chemical suppliers as a hydrate. An analysis of 25.0 g of this hydrate was conducted by evaporating the water as described in this experiment. The anhydrous cobalt (II) Chloride mass was 13.7 g. Determine the
- A 4 g sample of the metal nitrate M (NO_3)_2 was dissolved in water and treated with excess aqueous sodium sulfate. The sulfate salt that formed weighed 3.318 g. Determine the identity of the metal. A) Pb. B) Ba. C) Ca. D) K. E) None of these.
- Dumbledore decides to gives a surprise demonstration. He starts with a hydrate of Na2CO3 which has a mass of 4.31 g before heating. After he heats it he finds the mass of the 2 anhydrous compound is f
- Anhydrous sodium sulfate, Na_{2}SO_{4} absorbs water vapor and is converted to the decahydrate, Na_{2}SO_{4}-10H_{2}O How much would the mass of 24.65 ''g'' of anhydrous Na_{2}SO_{4} increase if con
- Anhydrous copper chloride can commonly have molecular formulas of CuCl, CuCl2 and Cu2Cl2. How can you distinguish between these forms of copper chloride? Is it that it gets more green when high in Cl-
- The following solid substances are in separate but unlabeled test tubes: Al2(SO4)3 cdot 18H2O, BaCl2 cdot 2H2O, KOH. Describe how you could identify the compounds by chemical tests using only these substances and water.
- 1. How would you know if a sample is dry when with a drying agent such as sodium sulfate?
- Starting with copper metal, describe how sample crystals of copper (II) chloride may be prepared in a laboratory.
- If cobalt (II) sulfate is heated too strongly, the following reaction will occur: CoSO4 arrow CoO(s) + SO3(g) If you are heating a sample of CoSO4 6H2O and this reaction occurs along with dehydration, what will happen to the experimental percent water? Ex
- Iron(II) Sulfate forms a blue-green hydrate with the formula FeSO_4 * H_2O(s). If this hydrate is heated to a high enough temperature, H_2O(g) can be driven off, leaving the dirty yellow anhydrous salt FeSO_4(s). An 18.300-g sample of the hydrate was heat
- If given a solution of a salt, describe how you would determine if the salt contained FeSO4.
- A 50.0 mg sample of FeCl3 xH2O was heated to drive off the waters of hydration. After cooling to room temperature, the resulting residue weighed 30.0 mg. Determine the chemical formula of the hydrate and name the hydrate.
- Why must the mass of an anhydrous salt be measured immediately upon cooling?
- To electrodeposit all the Cu and Cd from a solution of CuSO_{4} and CdSO_{4} required 1.10 For electricity (1F=1mole-). The mixture of Cu and Cd that was deposited had a mass of 50.22 ''g''. What ma
- Explain how water of hydration is related to measurement. Then explain how it is related to the law of definite composition.
- a. Describe the structure of copper(II) sulfate pentahydrate. b. What color change occurs when the salt is heated? c. What causes the color change?
- Starting with copper metal, describe how a sample of crystals of copper (II) chloride may be prepared in the lab.
- How do you calculate the aqueous by-product produced when you have the mass of the beaker with the product after it dried and it has dried?
- Explain in detail the keyway(s) in which the organization of particles is solved differently for an anhydrous ionic compound versus a hydrate.
- A student was given CaCl2 hydrate and from laboratory work obtained the following data: mass empty crucible 13.1381 g mass crucible + hydrated unknown 14.8205 g mass crucible + unknown after 1st he
- Iron(II) Sulfate forms a blue-green hydrate with the formula FeSO4 n H2O(s). If this hydrate is heated to a high enough temperature, H2O(g) can be driven off, leaving the pale yellow anhydrous salt FeSO4(s). A 6.060-g sample of the hydrate was heated to
- The deep blue compound Cu(NH_3)_4SO_4 is made by the reaction of copper(II) sulfate and ammonia. CuSO_4(aq) + 4NH_3(aq) ---> Cu(NH_3)_4SO_4(aq) a. If you use 47.0 g of CuSO_4 and excess NH_3, what is the...
- If 25 grams of copper (II) sulfate pentahydrate were heated until all water was removed, how much residue would remain?
- What are the step by step methods that are required in adding Na_2CO_3 to a tank of water?
- A 1.150 g sample of the hydrated salt ZnSO_4. X H_2O is dissolved in water and the sulfate ion is precipitated by adding an excess of BaCl_2 solution. The mass of pure and dry BaSO_4 precipitated obtained is 0.9335 g. What is the formula of the zinc sulfa
- Describe briefly, but including all essential experimental details and relevant equations, how you would prepare pure dry samples of anhydrous iron (ll) chloride starting from iron.
- Why might heating hydrates in a crucible to find the percentage of water in the hydrate not be appropriate for all hydrates? Is it because some are flammable and water vapor might escape?
- Give the name of the process when anhydrous copper sulfate becomes wet.
- A 10.0 g sample of alum is heated to drive off all of the water from the solid. Determine the mass of the dehydrated alum.
- Consider a mixture of the two solids CuSO_4 .5H_2O (250 g/mol) and KCl (74.5 g/mol). When the mixture is heated to 160^O C for 1 hour, the water of crystallization is driven off: CuSO_4.5H_2O (s, blue) to CuSO_4 (s, white ) + 5H_2O (g). A sample originall
- Explain how you would prepare a 1.135 m solution of KBr in water.
- A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO_4, is heated at a temp. above 170 degree C in a crucible, until a constant mass is reached. The mass of anhydrous CaSO4 is 1.577g.
- What is the difference between a hydrated compound and an anhydrous one?
- It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the water (dehydration). A 31.38 gram sample of a hydrate of MnSO4 was heated thoroughly in a porcelain crucible, until its weight remained constant. After heat
- Explain briefly why CuSO4 dissolves more easily in water than an organic solvent.
- Explain the differences between the two drying agents, anhydrous magnesium sulfate and anhydrous sodium sulfate.
- hydration of epsom How would your calculated value for the average number of water molecules present in Epsom salt be affected if you heated your samples too strongly and decomposition started to take
- If the sample contained a volatile impurity, what value would be in error, the weight of the anhydrous salt or the weight of the water? Explain.