science(chemistry)

the density of 3 molar solution of sodium chloride is 1.25gm/ml.calculate the molality of the solution

  1. 👍 0
  2. 👎 0
  3. 👁 191
  1. 3M NaCl = 3moles/L soln.
    3 moles = 3*58.5 g NaCl = about 180 mL but that's just approximately correct. You need to have a better answer than that.
    Then 1 L of the soln has a mass of 1.25 g/mL x 1000 mL = 1250 g. How much of that is water. It is 1250 g -180 g NaCl = about 1070 g H2O.
    Then m = moles/kg solvent.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. CHM 152

    At 20oC, a 2.32 M aqueous solution of Ammonium Chloride has a density of 1.0344g/ml. WHat is the molality of Ammonium Chloride in the solution? The formula weight of NH4Cl is 53.50 g/mol?? I am not sure how to incorporate the

    asked by Car on June 10, 2010
  2. Chemistry

    Calculate the molality of 6.00 M H2SO4 solution. The density of the solution is 1.34 g/mL.

    asked by Kari on May 5, 2010
  3. chem. 7

    a 20% solution of H2SO4 has a density of 1.14 g/mL. calculate the molarity, normality and molality of the solution.

    asked by Anonymous on December 3, 2010
  4. Chemistry

    What is the mass percent of an aqueous sodium hydroxide solution in which the molality of NaOH is 6.25m? The density of the solution is 1.2219 g/mL

    asked by Veronica on May 31, 2014
  5. Chemistry

    Calculate the molarity and the molality of an NH3 solution made up of 30 g of NH3 in 70 g of water. The density of the solution is 0.982 g/ml. Molar Mass of NH3 = 17.04 g

    asked by Sara on December 2, 2010
  1. Chemistry

    An aqueous solution is 8.50% ammonium chloride, NH4Cl, by mass. The density of the solution is 1.024g/mL. Calculate the molality, mole fraction, and molarity of NH4Cl in the solution. I know the formulas needed but I'm not sure

    asked by S on January 24, 2012
  2. chemistry

    calculate the molality of one molarity solution of sodium nitrare. the density of solution is 1.25g cm cube.

    asked by joyti on June 20, 2011
  3. Chemistry

    The density of an aqueous solution containing 10% of ethanol (C2H5OH) by mass is 0.984 g/ml. A) Calculate the molality of this solution. B) Calculate its molarity. C) What volume of the solution would contain 0.125 mol of ethanol.

    asked by Hilavidpreet on March 17, 2010
  4. chemistry

    Calculate the molality of a 2.50 molarity NaCl solution. Density of solution = 1.08 g/ml.

    asked by Anonymous on March 4, 2010
  5. chemistry

    Find the percent by mass of sodium chloride in a 1.35 M NaCl solution. The density of the solution is 1.06 g/mL..............how do I go about doing this question thanks!

    asked by wade on December 6, 2010
  6. Chemistryyy

    a) A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid? b) A

    asked by Xaxus on September 12, 2014

You can view more similar questions or ask a new question.