March 30, 2015

Homework Help: Chemistry

Posted by Andrew on Monday, March 30, 2009 at 10:26pm.

Calculate the value of the solubility product (Ksp) for CdS given the following standard reduction potentials:

CdS + 2e- --> Cd + S-2 E = -1.21V
Cd+2 + 2e- --> Cd E = -0.402V
CdS + Cd --> Cd + Cd+2 + S-2 E = -0.808
What I tried was:
E = E - (0.0591/n)log(K)
where E is zero since it is in equilibrium, and n is 2 because there are 2moles of electrons per mole of Cd.

I reversed the net equation because I was looking for the Ksp of CdS.

When I did this, I got 4.53*10^28, but the actual answer was 3.9*10^28.

Please help!
Thanks a lot.

I hope the error was from rounding up. :)

Answer this Question

First Name:
School Subject:

Related Questions

college chemistry - Cadmium sulfide (CdS) is used in some semiconductor ...
Chemistry - Calculate the solubility of cadmium sulfide, CdS, in mol/L, given ...
Math - Tell whose CD collection has the greater ratio of rock CDs to total CDs. ...
chemistry... HELP - Equilibrium constant question!!!? Standard reduction ...
elementary - nuber sense minnie has 6 county cds and 5 rock cds.amanda has 5 ...
Math - Find the number of each kind of object in the collection Miranda has 24 ...
chemistry - Using the given data, and the table of Standard Reduction Potentials...
Maths - The owner of a music store received a shipment of 1,532 cds the CDs came...
algebra - you buy a storage rack that holds 40 cds. you have 27 cds. write an ...
math - Sandy decided to give one-fourth of her CDs to Jenn. Then she gives one-...