Problema Solution
How many grams of pure acid must be added to 750 grams of a solution that is 20% pure acid to make a solution that is 50% pure acid?
Answer provided by our tutors
let
x = grams of pure 100% acid
grams of acid in x + grams of acid in 20% pure acid solution = grams of acid in the new 50% solution
1*x + 0.20*750 = 0.50(x + 750)
by solving we find
x = 450 gr
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450 grams of pure acid must be added.