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.

Question

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?

Stephon · Answer

Hi Gregory.

Gregory · Answer

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?

Gregory · Answer

At least with part b. I figured out that part a is Pb(NO3)2

Stephon · Answer

Lol same boat buddy.

DrBob222 · Answer

Here is the same problem (but different numbers) I worked for John just below. http://www.jiskha.com/display.cgi?id=1363319855

Gregory · Answer

Thank you so much once again Dr. Bob!