Homework Help: Chemistry

Posted by Cody on Sunday, March 17, 2013 at 6:23pm.

How many drops (1 drop=0.05mL) of 0.20M KI must we add to 100.0 mL of 0.010M Pb(NO3)2 to get a precipitate of lead iodide to start. Ksp of PbI2=7.1e-9.
Answer=9 drops. Please show steps.

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