Question

If $2\text{mL}$ acetone is dissolved in $20\text{mL}$ of water then, calculate the concentration $\left(v/v\%\right)$ of solution.

• A. $10\%$
• B. $9.09\%$
• C. $8\%$
• D. $6\%$

Answer 1

The correct option is B $9.09\%$

$v/v\%=\frac{\text{Volume of solute}}{\text{Volume of solution}}\times 100$
$=\frac{2}{2+20}\times 100=\frac{2}{22}\times 100$
$=9.09\%$ (Approx.)