Question

Silver nitrate is dissolved in 350.0 g water to make a solution that has a mass of 365.0 g. How should the percentage by mass of silver nitrate in this solution be calculated?

Answer 1

Step-by-step explanation:

The expression for calculating the percentage by mass is: % (m/m) = (mass of solute) / (mass of solution (solute + solvent)) x 100.

Here we have:

solvent = water = 350.0 g

solution = 365.0 g

solute = solution - solvent

solute = 365 - 350

solute = 15 g

So:

% (m/m) = (mass of solute) / (mass of solution) x 100.

% (m/m) = (15/365) x 100

% (m/m) = 4.1%

Answer: 4.1%