a chemist makes a mixture of concentrated hydrochloric acid

a chemist makes a mixture of concentrated hydrochloric acid and distilled water so that the ratio of acid to water is 4 to 3 if he start with 20 liters how much water is mixed with acid?

Solution

Total mixture = 20 L

ratio = Acid/water = 4/3

Amount of Acid = 4*20/(4+3) = 11.43 L

Amount of water = 3*20/(4 + 3) = 8.57 L

Initially there is 8.57 L water is mixed in 11.43 L acid