SOLUTION: How many litres of water must be added to 50 L of a 30% acid solution in order to produce a 20% acid solution?
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: How many litres of water must be added to 50 L of a 30% acid solution in order to produce a 20% acid solution?
This question is from textbook
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How many litres of water must be added to 50 L of a 30% acid solution in order to produce a 20% acid solution?
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Amt of 30% solution = 50 L; amt of active ingredient = 0.30*50 = 15 L
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Amt of water added = x L ; amt of active ingredient = 0x = 0
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Amt of 20% solution = (50+x) L; amt of active ingredient = 0.2(50+x) = 10+0.2x L
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EQUATION:
active + active = active
15 + 0 = 10 + 0.2x
5 = 0.2x
x= 25 L (amount of water that must be added)
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Cheers,
Stan H.
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