Two acid solutions are available to a chemist. One is 10% nitric acid solution, the other is 4% nitric acid solution. How much of each type of solution should be mixed together to form a 600 ml of a 6% nitric acid solution?

Answer 1

Ix x ml of 10%, then the rest (600-x) is 4%. So,

.10(x) + .04(600-x) = .06(600)

Answer 2

10