Thursday
July 24, 2014

Homework Help: Chemistry

Posted by Susie on Sunday, May 23, 2010 at 10:35pm.

I don't know how to start this problem. Someone can help me please.

One dm3 of a solution was prepared containing 0.0040 mole of Pb(NO3)2. The Ksp of PbCI2 for the existing conditions is 2.4 x 10^-4. From the list below, choose the smallest numbers of NH4CI that when added to this solution will cause PbCI2 to precipitate. (Assume no increase in volume).
a) 0.25 mole
b) 0.30 mole
c) 0.20 mole
d) 0.15 mole

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