# Two questions on colligative properties.

1. Feb 14, 2013

### mikepl1

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. Feb 15, 2013

### Saitama

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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