Homework Help: MATH

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

Answer this Question

Related Questions

math, Jay - How do these fractions turn into the following fractions. 1/3=10/30 ...
geometry - Point P is on the number number line. The distance between O and P is...
Friend need website - my friend need website where he find detailed business ...
math-moneyfractions - i have some math questions that i really ,really,need help...
math - can someone please answer these questions for me?: 1. if the measure of ...
spanish sra jmcguin - Hi I have so many tests - Is it possible to scan my ...
Science - Hi, I have two questions about biology I need help with. 1) Some ...
about Engineering - Electronic and Communication Engineering is mainly ...
Math - I have no idea how to understand quantitative comparison questions which...
7th grade Math - What is a complement in a set using set theory. Please explain ...

For Further Reading

First Name:
School Subject:
Answer: