What is the percent by volume if 30mL of alcohol is dissolved in 20 mL of water? (show work please)

Answer 1

The volume of the solute (alcohol) is 30 mL. The volume of the solvent (water) is 20 mL so, after you mix the two together, the volume of the solution = volume of the solute + volume of solvent = 30 + 20 = 50 mL.

The percent by volume of the alcohol is the volume of the alcohol divided by the volume of the solution (x 100 to turn it to a percent) = 30/50 = 60%