Question

1. An unknown number of liters of mixture containing 6% boric acid is to be mixed with 2 liters of

a mixture which is 15% boric acid. The new solution created is to be at a concentration of 12%
boric acid. How much of the 6% solution must be used? Show all work.

Answer 1

0.4

Explanation

2/0.15+x/0.06=x+2/0.12

30=x/0.12+2/0.12

1.6+2x=x+2

x=0.4