25.81%
The formula for calculating the percent volume/volume of a solution is given as:
[tex]\%v\text{/v}.=\frac{volume\text{ of solute}}{volume\text{ of solution}}\times100[/tex]Given the following parameters
volume of solute (methanol) = 80mL
volume of solution = volume of water + methanol
volume of solution = 80mL + 230mL = 310mL
Determine the required percent v/v
[tex]\begin{gathered} \%v\text{/}v=\frac{80mL}{310mL}\times100 \\ \%v\text{/}v=\frac{800}{31} \\ \%v\text{/}v=25.81\% \end{gathered}[/tex]Hence the percent volume/volume of a solution that contains 80 ml of methanol and 230 ml of water is 25.81%
