How many gallons of a 70 acid solution must be mixed with a 3 gal. of a 30% acid solution to make a 55% solution?

Question

asked Oct 18, 2020 234k views

1 Answer

Sam Gammon · Answer 1 · 2020-10-24T10:31:02+0000

Answer:

You would need 5 gallons of a 70% solution

Explanation:

You can always use proportions to answer these types of questions.

The numerator will be the amount of acid and the denominator will be the amount of solution

30% of 3 gallons is 0.9.

$(0.9+(7G)/(10) )/(3+G) =.55\\0.9 + .7G = 1.65 + .55G\\.15G = .75\\G=5$