How much pure acid should be mixed with 2 gallons of a 40% acid solution in order to geta 70% acid solution? im having a hard time coming up with the equation

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asked Jun 16, 2019 117k views

1 Answer

Aziz · Answer 1 · 2019-06-22T08:49:59+0000

0.7(2+x) = 0.4(2) + 1.0(x), the 0.7 is the 70% you want, 0.4(2) is what you have initially, and pure acid means 1.0 or 100%.