SOLUTION: How much pure acid should be mixed with 5 gallons of a 40% acid solution in order to get a 90% acid solution?
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Question 344931: How much pure acid should be mixed with 5 gallons of a 40% acid solution in order to get a 90% acid solution? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! How much pure acid should be mixed with 5 gallons of a 40% acid solution in order to get a 90% acid solution?
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Equation:
acid + acid = acid
x + 0.40*5 = 0.90(x+5)
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Multiply thru by 100 to get:
100x + 40*5 = 90x + 90*5
10x = 50*5
x = 25 gallons (amt. of pure acid needed for the mixture)
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Cheers,
Stan H.
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