Consider a 9% by mass aqueous ethyl alcohol solution.

a.) Calculate the molality of this solution_____m

b.) Given that ethyl alcohol is a molecular solute, calculate the freezing point of this solution. ________ degrees Celsius.

c.) Consider the boiling point of each solution. which one would raise the boiling temperature? _________ lower the boiling temperature? _________ explain.

  1. 👍 0
  2. 👎 0
  3. 👁 193
asked by amber
  1. a 9% by mass means 9g ethanol in 100 g solution or 9g ethanol/(9g ethanol + 91g H2O). m = mols/kg solvent
    convert 9g ethanol to mols. mol = grams/molar mass. Then m = mols/0.091 = ?

    delta T = Kf*m

    You don't have but one solution here; what are you comparing?

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    An aqueous solution of ethyl alcohol is made by transfering 1.32 mL of liquid ethyl alcohol to a 50.0 mL volumetric flask, and then adding enough water to fill the flask to the mark. What is the volume/volume percentage of ethyl

    asked by Sasha on March 27, 2017
  2. chemistry

    What is the percent by mass of 3.55 g NaCl dissolved in 88 g H2O? 2. A solution is made by adding 1.23 moles of KCl to 1000.0 g of water. What is the % by mass of KCl in this solution? 3. If you have 100.0 mL of a 25% aqueous

    asked by Anonymous on February 10, 2011
  3. college chem

    . Jack Daniels Tennessee whiskey is 40.00% ethanol by volume. However, % alcohol by mass is quite different from % by volume. The molality of ethanol in an aqueous solution that is 40.00 % ethanol by volume is 10.88 molal. A) Find

    asked by josh on March 9, 2010
  4. Chemistry

    Ethyl alcohol which is prent in many beverages molecular formular C2H6O.If 9.2g of ethyl alcohol are available.Calculate number of molecular of ethyl alcohol 9.2g of ethyl alcohol.

    asked by Anonymous on March 24, 2013
  5. chemistry

    how many grams of ethyl alcohol are needed to produce 1 L of a 2 mM solution if 1 mole =46g of ethyl alcohol. how do you calculate?

    asked by Chris on February 7, 2010
  1. Chemistry

    How would you prepare a 25.0% water in ethyl alcohol solution using 100.0 ml of ethyl alcohol (The density of ethyl alcohol is 0.7893 g/ml)

    asked by Hunter on August 24, 2012
  2. Chemistry

    I need help on this stoichiometry problem. I don't know whay my answer is incorrect. The fermentation of sugar to produce ethyl alcohol occurs by the following reaction: C6H12O6 -- 2C2H5OH + 2CO2 What mass of ethyl alcohol can be

    asked by Deni on September 28, 2010
  3. Chemistry

    A solution is made by adding 0.100 mole of ethyl ether to 0.500 mole of ethyl alcohol. If the vapor pressures of ethyl ether and ethyl alcohol at 20 oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution

    asked by Chris on November 14, 2013
  4. chem 1151

    a 250.0 mL of solution contains 50.0 mL acetone and 45.0 mL ethyl alcohol and the remainder water. Calculate the % acetone, % ethyl alcohol, and water in the solution. Show calculations.

    asked by ris on June 14, 2011
  5. Molality

    An aqueous solution contains 8.7% NaCl by mass. 1. Calculate the molality of the solution. 2. Calculate the mole fraction of the solution.

    asked by Kyle on January 30, 2010

More Similar Questions