Question

Calculate the $\left(V/V\right)\%$ of a solution of 15 mL of alcohol in 60 mL of water.
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Answer 1

Given,
Volume of solute, $V_1$ = 15 mL
Volume of solvent, $V_2$ = 60 mL
$\text{Volume of solution = Volume of solute + Volume of solvent}$
= 15 + 60 = 75 mL
Volume percent, % $\frac{V}{V}$ is the percent ratio of volume of solute in mL to volume of solution in mL

$\%\frac{V}{V}=\frac{\text{Volume of solute in mL}}{\text{Volume of solution in mL}}\times 100$

$\%\frac{V}{V}=\frac{15}{75}\times 100=20\%$