SOLUTION: A chemist has 400 milliliters of a solution that is half acid. She needs a solution that is 60% acid. How many millilters of acid should she add?
Question 619276: A chemist has 400 milliliters of a solution that is half acid. She needs a solution that is 60% acid. How many millilters of acid should she add? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A chemist has 400 milliliters of a solution that is half acid. She needs a solution that is 60% acid. How many millilters of acid should she add?
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Equation:
acid + acid = acid
0.50*400 + x = 0.60(400+x)
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Multiply thru by 100 to get:
50*400 + 100x = 60*400 + 60x
40x = 10*400
x = 100 mL (amt. of acid to be added)
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Cheers,
Stan H.
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