<PRE><B>Question 338740</B>
there is 10 liters of water and 10% of it is acid. how much more liters of water do you need to add for it to become 4% acid?
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Equation:
acid + acid = acid
0.10*10 + 0*x = 0.04(x+10)
Multiply thru by 100 to get:
10*10 = 4x+40
4x = 60
x = 15 liters (amt. of water you need to add to get the 4% mixture)
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Cheers,
Stan H.
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