# Calculate the molality of a solution prepared by dissolving 12.5 grams of NaCl in 250.0 grams of...

## Question:

Calculate the molality of a solution prepared by dissolving 12.5 grams of NaCl in 250.0 grams of water. Assume the density of the final solution is 1.03 g/mL.

## Molarity of a Solution:

Suppose the solute mole (n) is present in V liters of a solution; we determine the molarity using the below equation.

{eq}M\left( {{\rm{Molarity}}} \right) = \dfrac{{n\left( {{\rm{moles}}} \right)}}{{V\left( {{\rm{Liter}}} \right)}} {/eq}

The solute moles are defined using the solute mass and its molar mass.

The molarity denotes the molar concentration of a solute.

## Answer and Explanation: 1

Become a Study.com member to unlock this answer! Create your account

View this answer

**Given Data: **

- The mass of {eq}{\rm{NaCl}} {/eq} is {eq}{m_{{\rm{NaCl}}}} = 12.5\;{\rm{g}} {/eq}

- The mass of water is: {eq}m =...

See full answer below.

#### Ask a question

Our experts can answer your tough homework and study questions.

Ask a question Ask a question#### Search Answers

#### Learn more about this topic:

from

Chapter 9 / Lesson 4Learn how to find the molarity of a solution or the moles of gas in a given volume using stoichiometry. See examples of calculating moles from molarity.

#### Related to this Question

- Calculate the molality of KCL in the solution A solution was prepared by dissolving 43.0 g of KCL in 225 g of water.
- What is the molality of NaCl when 100g of this compound is dissolved in 500mL of water such that the density of the final solution is 1.16g/mL?Assume the density of pure water is 1g/ml.
- Calculate the molality of a 22.0% by mass aqueous solution of NaCl. The molar mass of NaCl is 58.44 g/mol.
- Calculate the molality of a solution containing 12.5 grams of C2H6O2 dissolved in 135 grams of water.
- The density of the 3M solution of NaCl is 1.25 g/mL. Calculate the molality of the solution.
- The density of 3.00 M solution of NaCl is 1.25 g/mL. Calculate the molality of the solution.
- Calculate the molality and osmolality of 20.0 g NaCl dissolved in 500.0 mL water.
- Calculate the molality of a 4.17 M aqueous NaCl solution. (density = 1.08 g/mL)
- Determine the molality and molarity of a solution prepared by dissolving 75.0 g of Ba(NO3)2(s) into 374.00 g of water at 250 degrees Celsius. (water density = 0.99707 g/mL3)
- A mass of 0.630 g of NaCl is dissolved in 525 g of water. Calculate the molality. mass of NaCl = 0.630 g mass of H2O = 525 g molar mass of NaCl = 58.44
- Calculate the molality of a 2.90 M NaCl solution with a density of 1.12 g/mL.
- Calculate the molality of a 1.90 M NaCl solution (density = 1.08 g/mL).
- Calculate the molality of a 2.20 M NaCl solution with a density of 1.12 g/mL.
- If 14.40 grams of RbCl are dissolved in water to make a solution of 0.224 L, the density is found to be 1.047 g/cm3. Calculate the molality of the solute.
- A hypersaline solution with a molality of 5.09 m has a salt content so high that the mass of the solution per 1,000 grams of water is 1,297 g. Calculate the molarity. (The density is 1.20 g/mL)
- A) What is the molality of a solution, if 250.0 g of NaCl is dissolved into 475.0 g of solvent (water)? B) What is the molarity of the solution in the previous question, if the solution's density is 1.083 g/ml?
- A solution contains 25.5 g of NaCl dissolved in sufficient water to give a total mass of 325.0 g. What is the molality of the solution?
- Calculate the molality of a solution containing 8.1 moles of solute in 4,847 grams of solvent.
- A solution is made by dissolving 100 grams of cobalt(II) chloride in 250 grams of water to make a solution that has a density of 1.25 g/mL. Calculate the molality of the solution.
- An aqueous solution contains 2.6 % NaCl by mass. Calculate the molality of the solution.
- If 12.20 grams of RbCl are dissolved in water to make a solution of 0.223 L, the density is found to be 1.040 g/cm^3. Calculate the molality of the solute.
- An aqueous solution contains 5.1% NaCl by mass. Calculate the molality of the solution and calculate the mole fraction of the solution.
- An aqueous solution contains 4.7% NaCl by mass. a. Calculate the molality of the solution. b. Calculate the mole fraction of the solution.
- What is the molality of a solution in which 3.0 moles of NaCl is dissolved in 1.5 kg of water?
- What is the molality of a solution in which 6.0 moles of NaCl is dissolved in 3.0 kg of water?
- What is the molality of a salt solution prepared by dissolving two moles of salt in 500 grams of water?
- Find the molality of a salt water solution containing 0.27 mol NaCl in 150 g water.
- Calculate the molality of each of the following aqueous solutions. a) 3.15 M NaCl solution (density of solution = 1.08 g/mL). b) 39.8 percent by mass KBr solution.
- Calculate the molality of a 48.9% (by mass) aqueous solution of sodium chloride.
- What is the molality of a solution formed by dissolving 40 g of NaCl in 500 mL of water?
- Calculate the molality of each of the following aqueous solutions: (a) 2.56 M NaCl (density of solution 1.08 g/mL). (b) 58.1 percent by mass KBr solution.
- Calculate the molality of 2.0 M MgCl2 solution. The density of the solution is 1.127 g/mL. (The molar mass of MgCl2 = 95.211 g/mol, and the molar mass of H2O is 18.02 g/mol.) a) 1.77 m b) 2.14 m c) 2.25 m d) 1.51 m e) 2.00 m
- What is the molality of a solution in which 25.8 g of NaCl is dissolved in 2.0 kg of water?
- What is the molality of a solution in which 35.0 g of NaCl is dissolved in 2.5 kg of water?
- Calculate the molality of an aqueous solution that is 9.70% NH3 by mass. The density of the solution is 0.9651 g/mL.
- Calculate the molality of a 48.8 percent (by mass) aqueous solution of sodium chloride.
- What is the molar concentration and molality of B in a solution prepared by dissolving 2.11 grams of B with a molar mass of 234.01 grams mol^-1 in 100 cubic cm of (i) water and (ii) benzene, knowing that the density of the solution in water is 1.01 grams
- How to calculate the molality for a solution compound from grams of solute and solvent?
- A solution is made by dissolving 373.5 g of Pb(NO3)2 (molar mass: 331.2 g/mol) in 2.00 x 10^3 g of water. What is the molality of the solution?
- Calculate the molality of a solution prepared by dissolving 10.1 g of sodium nitrate, (NaNO3; FM = 85.00 g/mol) in 225 g of H2O.
- A solution is prepared by dissolving 25.0 g of NH_4Cl (53.49 g/mol) in 400.0 g of water. The density of the resulting solution is 0.9854 g/ml. Calculate mass percent of NH_4Cl, mole fraction of NH_4Cl, molality, and molality of solution.
- What is the molality of a sodium chloride solution if 9.6 grams of the salt is added to 998 grams of water?
- A solution contains 0.121 mol of NaCl dissolved in 5.79 mol of water. a) What is the mole fraction of NaCl? b) What is the molality of the solution?
- A solution is prepared by dissolving 193 grams of glucose in 607 grams of water. What is the molality of the solution?
- Find the molality (m) of a solution prepared by dissolving 180.0 gram of C3H8O in 3.00 kg of water. a) 0.998 m b) 16.7 m c) 0.136 m d) 0.600 m
- Calculate the mass percent of a NaCl solution in which 157 grams of NaCl is dissolved in 1.75 L of water at 25 degrees Celsius. (density = 0.997 g/mL)
- Calculate the mass percent of a NaCl solution in which 189 grams of NaCl is dissolved in 1.38 L of water at 25 degrees Celsius. (density = 0.997 g/mL)
- Calculate the molality of a solution with a 0.014 mol solute and a 20.1 g solvent.
- Calculate the molarity (in mol/L), molality (in mol/kg), and mass percent (in %) of the solute in the following solution: 1.60g LiCl and 27.8g H_2O.
- Calculate the molality of a solution containing 234 g glucose ( C 6 H 12 O 6 ) dissolved in 1.91 L of water. Assume a density of 1.00 g/mL for water.
- The molarity and the molality of a solution prepared by dissolving 2.00 g of ethanol C2H5OH with 99.0 g of water to give a final volume 101 mL are Molarity and molality.
- What is the molality of a solution prepared by dissolving 16 grams of urea in 39 grams of water?
- What is the molality of a solution prepared by dissolving 2.58 grams of urea in 97.5 grams of water?
- Calculate the molality of a solution with a 0.932 mol solute and a 0.255 kg solvent.
- A solution is prepared by dissolving 25.2 grams of sodium hydroxide in 150.0 grams of water at 25 degrees Celsius. The final volume of the solution is 172.0 mL. What is the molality of the solution?
- Calculate the molality of a solution prepared by dissolving 3.60 g of ethanol in 100.0 g of water to give a final volume of 102 mL.
- A solution is prepared by dissolving 17.1 grams of sucrose, C_{12}H_{22}O_{11}, in 275 grams of H_2O. What is the molality of that solution?
- What is the molality of a solution composed of 11.1 g NaCl dissolved in 638 g of water?
- Calculate the molality of a solution containing 174 grams of HCl in 757 grams of water.
- Calculate the molality of a solution of 50 mL of ethanol, C2H5OH (density = 0.789 g/mL), which is dissolved in 0.25 L of water (density = 1.00 g/mL).
- Calculate the molality of a solution prepared by dissolving 2.5 grams of potassium chlorate in 512 grams of water.
- Calculate the molality of a solution that contains 25 grams of H2SO4 dissolved in 40 grams of water.
- What is the molality of a solution made by dissolving 43.3 grams of sodium chloride?
- What is the molality of 150.0 g of NH_3 dissolved in a solution that is 1.25 L? The density of the solution is 1.45 g/ml.
- Calculate the molality of a sucrose solution made by dissolving 39.1 grams of sucrose in 89.4 grams of water.
- What is the molality of an aqueous solution of a compound with a molar mass of 120 g/mol that has a density of 1.56 g/mL and a molarity of 5.78 M?
- Calculate the molality (m) of a solution that consists of 65.0 grams of glucose, a non-electrolyte, added to 0.112 kg of water.
- What is the molality of a sodium chloride solution if 3.5 grams of the salt is added to 998 g of water?
- A solution is made by dissolving 96.2 g of HI in 3.75 liters of water at 90^\circ C. Given that the density of water at this temperature is 0.9585 \dfrac{g}{ml}, find the following: a) Molarity b) Molality
- Calculate the molality (m) of a solution that consists of 0.320 moles of sucrose (C12H22O11), a non-electrolyte, dissolved in 1.50 kg of water.
- Compute the molality of a solution containing 287 g of glucose (C6H12O6) dissolved in 1.52 L of water. Assume a density of 1.00 g/mL for water.
- What is the molality of a solution prepared by dissolving 0.40 mol into 2.0 kg of solvent? a. 0.2 m b. 0.8 m c. 0.4 m d. 5.0 m e. 0.50 m f. 2.0 m g. 0.38 m
- Find the mass of sodium chloride required to prepare 500.0 g of 1.5 molal solution of sodium chloride. (Hint: 1.5 molal solution is obtained my dissolving 1.5 moles of NaCl in 1.0 kg of water. What is the total mass of this solution?)
- What is the molality of a solution prepared by dissolving 72.0 grams of ethylene glycol, HOCH2CH2OH, in 1.55 L of water? Assume the density of water is 1.00 g/mL.
- Suppose 2.80 grams of NaNO3 is added to 17.20 grams of water. Calculate the molality of the solution.
- Calculate the molality of a solution formed by dissolving 42.3 g of LiBr (MW = 86.8 g/mol) in 650.0 mL of water and 25 degrees C (Density of water 0.997 kg/L). A. 0.065 m. B. 0.752 m. C. 0.013 m. D. 3.20 m. E. 0.015 m.
- Calculate the molality of a 36.0% CuCI2 solution whose density is 1.462g/ml.
- What is the molality of a solution containing 11.1 grams Na_2SO_4 dissolved in 2269.2 grams of water?
- A 1.30 M solution of CaCl2 in water has a density of 1.11 g/ mL. Calculate the molality of this solution.
- I added 0.2968 g of an unknown to a solution. I found that the molality of the solution is 0.085 m and there is 0.0156 kg of solvent. Calculate the moles of solute present in the solution.
- Calculate the molality of CsCl in a 19 % by mass aqueous solution?
- What is the molality of a solution prepared by dissolving 317 g of CaCl2 into 2.50 kg of water? a. 1.14 m b. 0.127 m c. 127 m d. 3.21 m
- What is the molality of a solution prepared by dissolving 317 g of CaCl2 into 2.50 kg of water?
- What is the molality of a solution prepared by dissolving 317 g of CaCl2 in 2.50 kg of water?
- Determine the molality of a solution prepared by dissolving 0.500 moles of CaF2 in 11.5 moles of H2O.
- An aqueous solution was made with 296.6 g of Mg(NO3)2 and has a molality of 3.6 m. Assume that the density of water and the solution is 1.24 g/mL.
- Suppose 12.0 grams of acetic acid is dissolved in 188.0 grams of water. The density of the solution is 1.12 g/mL. Calculate the molality of this solution.
- Calculate the molality of a solution containing 12.5 grams of ethylene glycol dissolved in 135 grams of water.
- Calculate the molality of an aqueous solution that is 13.5% by mass calcium chloride. You might need to know that the density is 1.24 g/mL.
- What is the molality of a solution composed of 120 grams of acetone, (CH3)2CO, dissolved in 360 grams of water? Answer in units of m.
- Determine the molality of a solution made by dissolving 50.0 g of glucose (C_6H_{12}O_6, molar mass = 180.1 g / mol) in 294 g of water. a. 0.170 M b. 0.372 M c. 0.944 M d. 1.23 M
- What would be the molality of a solution made up of 75 cm^3 of water and 0.21 g of NaCl?
- For solutions of NaCl in water the volume in cm^3 of the solution as a function of molality was found to follow the following equation, V = 0.4992 m^2 + 18.438 m + 1003.0. The molar mass for NaCl and water are 58.443 g/mol and 18.015 g/mol, respectively.
- Calculate the molality of a solution formed by adding 2.435 g of methanol (CH3OH) to 100.00 mL of water. The density of water is 0.9982 g/mL.
- Calculate the molality of the solution prepared by dissolving 0.50 g (NH_4)_2SO_4 in 50 g H_2O.
- What is the molality of a solution prepared by dissolving 40.0 g of glucose in 4.0 kg of water?
- A solution is prepared by dissolving 16.2 grams of benzene in 282.0 grams of carbon tetrachloride. Calculate the molality of this solution.
- Calculate the molality of a 0.15 mol solute and a 0.350 kg solvent.
- What is the molality if 82 grams of CaNO_4 is dissolved in 2000 grams of water?
- Calculate the molality of 1.22 M sugar (C12H22O11) solution (density of solution = 1.12 g/mL).