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Re: phreeqc-2 v2.7 molarity/molality conversion oddity




Molality is moles/L and the assumed density is 1.0. That implies that the
input concentrations are equal to moles/kgsolution. To convert this to
moles./kgw, the sum of the mass of the solutes is subtracted from 1 kg of
solution to obtain the number of kilograms of water. The moles divided by
the number of kilograms of water gives molality. If you increase your
concentrations, you will see more of an affect.

David



David Parkhurst (dlpark@xxxxxxxx)
U.S. Geological Survey
Box 25046, MS 413
Denver Federal Center
Denver, CO 80225

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