October 9, 2015

Homework Help: Chemistry

Posted by Sam on Monday, July 1, 2013 at 6:57pm.

A hard water sample contains 121 mg of CaCO3 per liter of water. Calculate the mass of Na3Po4 needed to remove all Ca^2+ ions from 2.50 L of the water sample?
Please help! This question is already on here, but I don't understand the part where it says substitute expression into ksp & solve for PO4^3 & the rest?

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