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Two questions on colligative properties.

  1. Feb 14, 2013 #1
    1. The problem statement, all variables and given/known data
    Could anyone help me with these two problems? The answer for the first one is 89.5%- 91.2% and the second one is 213 grams of glucose, but I didn't get those answers.

    1. In making candy, a certain recipe calls for heating an aqueous sucrose solution to the "soft-ball" stage which has a boiling point of 235-240 degrees Fahrenheit. What is the range of mass percentages of the solutions of sugar (C12H22O11) that boil at those two temperatures? (Hint: Remember that temperature changes are in Celsius)
    2. How many grams of glucose (molar mass= 180.9 g/mol) must be dissolved in 255 g of water to raise the boiling point to 102.36 deg. Celsius?


    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 15, 2013 #2
    Hi mikepl1, Welcome to PF!

    As per the forum rules, you need to show us your attempt at the problem before asking for help. :)
     
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