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10% solution [Jun. 29th, 2011|09:29 pm]
Chemistry Help



I need to make  10% formic acid   (my formic acid has a 88% purity)

i'm confused as to how to do this. let's use 100 mL to make it easier to calculate.

Do I:

A.  10 mL formic acid + 90 mL H20


B. 10 mL formic + 100 mL H2O?

When do I use A and when do I use B to calculate?

I was making a 0.1% Formic acid in water 1 L solution, I used calculation B to make the solution.  1.14 mL of formic acid + 1000mL H2O.

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2013-02-17 11:47 am (UTC)
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