SOLUTION: A chemist has 60 g of a solution that is 70% acid. How much water should be added to make a solution that is 40% acid?

Question 164104: A chemist has 60 g of a solution that is 70% acid. How much water should be added to make a solution that is 40% acid?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A chemist has 60 g of a solution that is 70% acid. How much water should be added to make a solution that is 40% acid?
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The original solution has 42 gm (60*0.7) of acid, 18 gm of water.
Adding water to make 42 gm 40% means 100% will be 42/0.4 grams, = 105 grams total.
He'll have to add 45 grams of water.
You'd think a chemist could figure that out himself.

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