SOLUTION: How many liters of water should be added to 20 liters of a 30% sulfuric acid solution to reduce it to a 15% solution?

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Question 953593: How many liters of water should be added to 20 liters of a 30% sulfuric acid solution to reduce it to a 15% solution?
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
How many liters of water should be added to 20 liters of a 30% sulfuric acid solution to reduce it to a 15% solution?
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Add w liters
20*30 + w*0 = (20+w)*15

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How many liters of water should be added to 20 liters of a 30% sulfuric acid solution to reduce it to a 15% solution?
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water + water = water
0.7*20 + 1*x = 0.85(20+x)
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70*20 + 100x = 85*20 + 85x
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15x = 15*20
x = 20 liters (amt. of water to add)
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Please let me know if this helps.
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Cheers,
Stan H.
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