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Chemistry Forums for Students => Analytical Chemistry Forum => Topic started by: poochiram on November 21, 2004, 12:39:28 PM

Title: ppm to mole conversion
Post by: poochiram on November 21, 2004, 12:39:28 PM
How to convert 37 ppm Mg into moles?
Title: Re:ppm to mole conversion
Post by: Mitch on November 21, 2004, 04:11:31 PM
Show that you have attempt the problem before posting.
Title: Re:ppm to mole conversion
Post by: AWK on November 22, 2004, 02:25:34 AM
ppm is a concentration unit. It cannot be converted to amount of matter (moles) directly.
You can calculate moles of substance in solution (or mixture) of known volume or mass.
Title: Re:ppm to mole conversion
Post by: kevins on November 22, 2004, 09:27:48 AM
poochiram:

ppm = part per million

I guess you have a aqueous solution contains 37 ppm Mg

37 ppm Mg solution = 37 milligram of Mg in 1 L water.
Title: Re:ppm to mole conversion
Post by: AWK on November 22, 2004, 10:10:46 AM
http://en.wikipedia.org/wiki/Parts_per_million
Title: Re:ppm to mole conversion
Post by: Donaldson Tan on December 26, 2004, 06:31:41 PM
ppm is a mass fraction. it is similar to percentage where u multiply the fraction by 100%. In ppm case, u multiply by 1 million.

ppm of a solute = (mass of solute) / (mass of solvent) x 106

37ppm of Mg tells u every million kg of solvent corresponds to 37kg of Mg. Given this information, you should above to work out its molar concentration by converting the required mass to moles.