Question

A solution contains 30 mL of ethyl alcohol mixed with 100 mL of water. What is the concentration of the solution in terms of volume by volume percentage?

• A. 7.69%
• B. 30%
• C. 23.07%
• D. 20%

Answer 1

The correct option is C

23.07%

Volume of solute (ethyl alcohol) = 30 mL

Volume of solvent (water) =100 mL

Total volume of solution = 30 + 100 = 130 mL

Volume by volume % = $\frac{\text{Volume of solute}}{\text{volume of solution}}\times 100$ = $\frac{30}{130}\times 100$ = 23.07%.