Question

If you have 20 mL of alcohol n a 100 mL solution what percent of concentration of the solution by volume?

Answer 1

The concentration of the solution is 20 % by volume.

Percent by volume = `"Volume of alcohol"/"Total volume of solution"` × 100 %

Percent by volume = `(20"mL")/(100"mL")` × 100 % = 20 %