SOLUTION: How much water should be added to 22mL of 12% alcohol solution to reduce the concentration of 11%

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Question 617141: How much water should be added to 22mL of 12% alcohol solution to reduce the concentration of 11%
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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How much water should be added to 22mL of 12% alcohol solution to reduce the concentration of 11%
:
Let w = amt of water required to accomplish this
:
.12(22) = .11(w+22)
2.64 = .11w + 2.42
2.64 - 2.42 = .11w
.22 = .11w
w = .22/.11
w = 2 ml required