SOLUTION: how many milliliters of pure water should a pharmacist add to a 50 ml of a 15% solution to make a 10% solution

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Question 1000397: how many milliliters of pure water should a pharmacist add to a 50 ml of a 15% solution to make a 10% solution
Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
50(.15)=.10(50+n)
7.5=5+.1n
.1n=2.5
n=25
75(.1)=50(.15)
25ml of pure water needs to be added ☺☺☺☺