Question

A solution is prepared by dissolving 20 mL of pure hydrogen peroxide in enough water to make 200 mL of solution. What is the concentration of the hydrogen peroxide solution?

Answer 1

volume percent = $\frac{volume of solute}{volume of solution}$ ×100

= $\frac{20mL}{200mL}$ ×100

= 10%

The concentration of the hydrogen peroxide solution is 10% in the solution