Homework Help: Chemistry

Posted by Gregory on Friday, March 15, 2013 at 12:02am.

Solid Na2SO4 is added to a solution which is 0.012 M in Pb(NO3)2 and 0.048 M in AgNO3. Assume the volume remains constant. Ksp = 2.0 10-8 for PbSO4 and Ksp = 1.2 10-5 for Ag2SO4.
(a) Which compound precipitates first?

(b) What is the concentration of the first ion precipitated when the second ion starts to precipitate?

Chemistry - Stephon, Friday, March 15, 2013 at 12:16am
Hi Gregory.
Chemistry - Gregory, Friday, March 15, 2013 at 12:20am
Well, what a coincidence. Hello Stephon! My uncle's name is Stephon, but he lives across the country from me. Anyways, can someone please help me with this problem?
Chemistry - Gregory, Friday, March 15, 2013 at 12:21am
At least with part b. I figured out that part a is Pb(NO3)2
Chemistry - Stephon, Friday, March 15, 2013 at 12:23am
Lol same boat buddy.
Chemistry - DrBob222, Friday, March 15, 2013 at 12:37am
Here is the same problem (but different numbers) I worked for John just below.
http://www.jiskha.com/display.cgi?id=1363319855
Chemistry - Gregory, Friday, March 15, 2013 at 12:48am
Thank you so much once again Dr. Bob!

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