Question

What volume of ethyl alcohol and water must be mixed together to prepare 250 ml of 60% by volume of alcohol in water answer?

Answer 1

60% by volume of alcohol solution means,each 100 ml of solution will have 60 ml ethyl alcohol. hence in a250ml solution of 60% by volume of alchohol and water,alcohol should be 150 ml and water should be 100ml. 60% v/v means 60 ml ethanol in 100 ml of solution.