Seventy-five milliliters of a 10% acid solution are mixed with 30mL of 2.5% acid solution. How much acid is in the mixture?

Question

Seventy-five milliliters of a 10% acid solution are mixed with 30mL of 2.5% acid solution. How much acid is in the mixture? 

Answer 1

10% of 75ml = 0.1(75) = 7.5ml of acid

 

2.5% of 30ml = 0.025(30) = 0.75ml of acid

 

The mixture will have 7.5 + 0.75 = 8.25 ml of acid