SOLUTION: A Chemist has 100g of 25% acid solution. How much of these solution he needs to drain and replaced with 70% acid solution to obtain 100g of 60% acid solution?

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Question 1006423: A Chemist has 100g of 25% acid solution. How much of these solution he needs to drain and replaced with 70% acid solution to obtain 100g of 60% acid solution?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Very common drain-and-replace mixture problem, thoroughly explained in the lesson:
LESSON: http://www.algebra.com/my/drain-and-replace-antifreeze.lesson?content_action=show_dev