SOLUTION: how much water should be added to 30 liters of a 40 percent acid solution to reduce it to a 30 percent solution?

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Question 630802: how much water should be added to 30 liters of a 40 percent acid solution to reduce it to a 30 percent solution?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
how much water should be added to 30 liters of a 40 percent acid solution to reduce it to a 30 percent solution?
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Equation:
water + water = water
0.60*30 + x = 0.70(30+x)
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60*30 + 100x = 70*30 + 70x
30x = 10*30
x = 10 liters (amt. of water to add)
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Cheers,
Stan H.
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