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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: derek0o0 on January 17, 2010, 06:49:23 PM

Title: how to convert %w/v to ppm?
Post by: derek0o0 on January 17, 2010, 06:49:23 PM

lets say a sample has a concentration of 0.5%w/v
then how to work it out to ppm?
0.5 divide by million?

thx

Title: Re: how to convert %w/v to ppm?
Post by: Dan on January 18, 2010, 09:51:53 AM

Well, % just means parts per hundred - so how do you think you convert that to parts per million?

Title: Re: how to convert %w/v to ppm?
Post by: JGK on January 18, 2010, 12:57:18 PM

Quote from: Dan on January 18, 2010, 09:51:53 AM

Well, % just means parts per hundred - so how do you think you convert that to parts per million?

Not in this case as its % w/v (it would if it was w/w).

5% is 5g/100 mL ideally you need the density of the solution (g/mL) to calculate a g/g value which you could convert to ppm

Title: Re: how to convert %w/v to ppm?
Post by: mbeychok on January 23, 2010, 05:32:42 PM

A sample of what? A gas or a liquid? It makes a difference.