Question #7b124
1 Answer
The solution should contain 21 % sucrose by mass.
This is really two problems: (a) What molality of solution will give the observed boiling point? (b) What is the percent composition of this solution?
Step 1. Calculate the molality of the solution.
Step 2. Calculate the percent composition.
Moles of sucrose = 0.78 mol sucrose ×
So you have 270 g sucrose in 1 kg water.
% by mass =