Question

A solution is made by adding 25mL of benzene to the solvent toluene. The volume of the solution is 80mL. What is the percent concertation by volume of benzene?

Answer 1

$\begin{aligned} \textsf{Volume of Solute (Benz}&\textsf{ene)} = 25mL\\ \textsf{Volume of Solution} &= 80mL\\ \\ \%\textsf{ Volume Concentration} &= \dfrac{\textsf{Volume of Solute}}{\textsf{Volume of Solution}}×100\% \\ \\ &= \dfrac{25mL}{80mL} × 100\%\\ \\ &= 31.25\% \end{aligned}$

$\therefore$ The percent concentration by volume of benzene is 31.25%.