Posted by **LILY** on Monday, July 21, 2008 at 12:00pm.

I have about 30 questions of this, so I need to understand the process. Please make it as detailed as possible! Thank you!

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

A: Equation: _____

Answer is: _____

- MATH -
**Reiny**, Monday, July 21, 2008 at 12:25pm
Something usually stays the same, in your case it would be the amount of antiseptic which would be 25% of 32 g or 8 g.

So let's add x g of distilled water, so now we have (32+x) g.

10% of that is still 8 g of the antiseptic.

so equation : 10/100(x+32) = 8

solve that to get x = 48 g

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