Two questions on colligative properties.

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SUMMARY

The discussion focuses on two problems related to colligative properties in chemistry. The first problem involves calculating the mass percentage of sucrose solutions that boil at 235-240 degrees Fahrenheit, yielding a range of 89.5% to 91.2%. The second problem requires determining the mass of glucose needed to raise the boiling point of water to 102.36 degrees Celsius, resulting in a requirement of 213 grams of glucose. These calculations utilize the principles of colligative properties and boiling point elevation.

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Homework Statement


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?


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The Attempt at a Solution

 
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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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