Question

HOW MUCH PURE ACID SHOULD BE MIXED WITH 5 GALLONS OF A 30% ACID SOLUTION IN ORDER TO GET A 50% ACID SOLUTION?

Answer 1

p(1) + 5(.3) = (p+5)(.5)

Answer 2

p + 1.5 = .5p + 2.5
.5p = 1
p = 1/.5 = 10/5 = 2

2 gallons

Answer 3

thank you so much!