chem

an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL)
[ans: M=1.92M, m=2.0m, 10.4 %]
i need the calculation work bcus my ans is contradict from the real ans.

  1. 👍 0
  2. 👎 0
  3. 👁 208
asked by lily
  1. I don't want to work the problem for you but here are the definitions. Actually, that's all you need with the data you have.
    M = #moles/L soln
    m = #moles/kg solvent
    mass% = grams solute/100 g soln
    You get moles from grams/molar mass.
    You convert g to kg by dividing by 1000 (moving the decimal point to the left three places).
    The density equation is
    mass = volume x density.

    1. 👍 0
    2. 👎 0
  2. ~for M i got 2.28M
    my calculation: M=2.28/1
    but the ans is 1.92M.

    ~for the mass% i got 12.31%
    my calculation: mass%=133/1080x100%
    but the ans is 10.4%

    1. 👍 0
    2. 👎 0
    posted by susan

Respond to this Question

First Name

Your Response

Similar Questions

  1. chem

    an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL) [ans: M=1.92M, m=2.0m, 10.4 %] i need the calculation

    asked by lily on July 22, 2011
  2. chemistry

    An aqueous solution is made using 137g of diluted to a total solution volume of 1.30L .Calculate the molarity.molality and mass percent of solution.*assume a density of 1.08g/ml for the solution..

    asked by noor on July 28, 2012
  3. chemistry

    A) A solution was prepared by dissolving 1.113 g of MgCl2 into water and made up to 50.0 ml, calculate the molar concentration of the solution. B) A 250.0 ml of 0.50 M solution of Na3PO2 solution was prepared by diluting 2.5 M of

    asked by henry39 on December 24, 2016
  4. Chemistry

    An aqueous KNO3 solution is made using 73.4g of KNO3 diluted to a total solution volume of 1.86 L. Calculate the molarity of the solution. (Assume a density of 1.05 g/ml for the solution.)

    asked by Anna on January 29, 2013
  5. chem

    . (a) A solution was prepared by dissolving 1.4295 g of magnesium chloride (MgCl2) into water and made up to 25.0 mL, calculate the molar concentration of the solution. (3 marks) (b) A 250.0 mL of 0.50 M solution of sodium

    asked by lightning on October 13, 2016
  6. chemistry

    10g of nacl were added to 10ml of water. the resulting solution was diluted to be a final volume of 250ml. Given the density of the solution is 0.9864g/ml. Calculate the molality of the solution. Who helps

    asked by Fai on December 25, 2012
  7. Chemistry

    An aqueous KNO3 solution is made using 72.5 grams of KNO3 diluted to a total solution volume of 2.00 liters. If the molarity of the solution is .359 M and the molality of the solution is .354, what is the mass percent of the

    asked by Adam on February 19, 2012
  8. chemistr

    10g of nacl were added to 10ml of water. he resulting solution was diluted to be a final volume of 250ml. Calculate the molarity of the solution. My calculation 10g/58g/mol = 0.173M 0.173M/025L =0.689M Given the density of the

    asked by Fai on December 25, 2012
  9. Chem

    An aqueous KNO3 solution is made using 82.7 grams of KNO3, diluted to a total solution volume of 1.50 L. The density of this solution is 1.05 g/mL. What is the molality of this solution?

    asked by Ryan on May 2, 2011
  10. chemistry

    A 2.500×10−2M solution of NaCl in water is at 20.0∘C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was

    asked by Jason on May 24, 2015

More Similar Questions