Question

how much pure acid must be added to 15 ounces of an acid solution which is 40% acid in order to produce a solution which is 50% acid?

Answer 1

x ounces + 15 ounces = 15+x ounces in jar

x ounces + .4(15) = .5 (15+x)

x + 6 = 7.5 + .5 x

.5 x = 1.5

x = 3

Answer 2

Thank you

Answer 3

You are welcome.