A mixture containing 6% boric acid is to be mixed with 2 quarts of a mixture which is 15% acid in
order to obtain a solution which is 12% acid. How much of the 6% solution must be used? Choose the correct choice from the following choices
A) 1 B) 2 C) 3 D) 4 E) 5
This is a mixture problem.   The question asks, “How much of the 6% solution”.   Let x the number of quarts of 6% solution needed.   Write the equation and solve.   0.06+0.15(2)=0.12(x+2)   0.06x+0.30=0.12x+0.24   6x+30=12x+24   6=6x   x=1   The answer: 1 qt of 6% boric acid solution must be used.   correct answer 1
<result>A</result>
A mixture containing 6% boric acid is to be mixed with 2 quarts of a mixture which is 15% acid in
order to obtain a solution which is 12% acid. How much of the 6% solution must be used?