A chemistry question

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Dec 14th, 2002, 04:00 AM
abdul

A chemistry question

I want to find the experimental solubility product constant for PbCl2 (Lead(2) Chloride). The volume of PbCl2 is 100ml, and after Zinc (solid) is mixed with it and left to react for about one day, Zinc has reacted 1.85 E -3 moles. I don't think Zinc has to do anything with Keq of PbCl2 but when I just calculate the Keq using the concentration of Pb (3.6 mol/L) and the concentration of Cl (7.2 mol/L), I get a really big number, using the the following equation:
PbCl2 ---> Pb+2 + 2Cl-1

Any other way to do this and get an answer which is around 2.0 E -5 ?
Dec 14th, 2002, 06:10 AM
Celest

yes.
Dec 14th, 2002, 01:47 PM
abdul

Ok...:rolleyes:

Anybody else please?
Dec 14th, 2002, 02:21 PM
Skitchen8

i'd tell u, but then i'd have to kill u
Dec 14th, 2002, 03:07 PM
DiGiTaIErRoR

Quote:

experimental solubility product

Wouldn't that infer there's multiplication?
Dec 14th, 2002, 04:08 PM
abdul

Yes, there is multiplication like in this:
[Pb+2] * [Cl-1]2

But I don't get the right answer with it. I think I also have to use the concentration of Zinc which I am not sure about.

Still waiting for a good answer....
Dec 14th, 2002, 06:05 PM
DiGiTaIErRoR

well...

the Ksp of PbCl2 = 1.7 x10^-5
Dec 14th, 2002, 06:09 PM
MartinLiss

That's Greek to me, but apparently Google understands it. I did a search for experimental solubility product constant and got a number of interesting hits.
Dec 14th, 2002, 07:13 PM
Skitchen8

try looking through this maybe?? http://www.google.com/search?hl=en&l....7+x10%5E-5%22