SOLUTION: Ryan has six liters of 74% acid. How much acid should he add to make a solution that is 80% acid?

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Question 784999: Ryan has six liters of 74% acid. How much acid should he add to make a solution that is 80% acid?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
That question assumes the more concentrated acid is 100% and is liquid.


Let v = volume of 100% acid to add.
%286%2A74%2Bv%2A100%29%2F%28v%2B6%29=80

Solve for v.