Question 488103
How much water should be added to 20mL of 13% alcohol solution to reduce the concentration to 10%
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let x=ml of water to be added to 20 ml of 13% solution.
x+20= ml of 10% solution
13%*20=10%*(x+20)
2.6=0.1x+2
0.1x=0.6
x=6 ml