SOLUTION: What quantity of pure acid must be added to 400 mL of a 50% acid solution to produce a 60% acid solution?

SOLUTION: What quantity of pure acid must be added to 400 mL of a 50% acid solution to produce a 60% acid solution?

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Question 899728: What quantity of pure acid must be added to 400 mL of a 50% acid solution to produce a 60% acid solution?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Being unknown acid identity, this will work for mass per volume, or for volume per volume percentage concentration:

http://www.algebra.com/my/Two-Part-Mixture-with-one-material-quantity-unknown.lesson?content_action=show_dev
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