SOLUTION: To reduce 32 grams of a 25% antiseptic solution to a 10% antiseptic solution, how much distilled water should a pharmacist add?

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Question 970095: To reduce 32 grams of a 25% antiseptic solution to a 10% antiseptic solution, how much distilled water should a pharmacist add?
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
.
32 grams of 25% solution contains (0.25)(32g)=8 grams of antiseptic.
8 grams is 10% of (8g)/0.10=80 grams
80 grams-32 grams=48 grams
ANSWER: You should add 48 grams of water to 32 grams of 25% solution to make a 10% solution.