SOLUTION: How much 4.5% sodium acetate solution can be made from 32ml of a 12% sodium acetate solution?

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Question 865742: How much 4.5% sodium acetate solution can be made from 32ml of a 12% sodium acetate solution?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Easier to ask how much water is needed to make 4.5% from 32 ml of 12%. That is a high enough concentration that density should be needed, UNLESS percent is in mass per volume.

Let u = how much ml of water to add;
ASSUMING percents are mass per volume.

highlight_green%2832%2A12%2F%28u%2B32%29=4.5%29.
Solve for u.