Question

A solution is prepared by dissolving 20 grams of solute in 100 grams of water. Calculate the mass by mass percentage of the solution.

Answer 1

Mass by mass percentage is used to measure the concentration of a solution.

Mass by mass percentage of a solution $=\frac{\text{Mass of the solute}}{\text{Mass of the solution}}\times 100$

Given,
Mass of solute = 20 g
Mass of solvent = 100 g
The mass of solution = 20 + 100 = 120 g

Mass by mass percentage of a solution = $\frac{20}{120}\times 100=16.66\%$