Posted by **Chloe** on Tuesday, May 14, 2013 at 2:24am.

Using your experimental data, calculate E0cell. Standard voltaic cells contain 1M solutions, but we used 0.10M solutions in all of our half cells. Use the Nernst equation to calculate the standard cell potential (E0cell) from your measured Ecell and Qrxn.

Data:

Nernst Equation: Ecell=E0cell -RT/nF ln Q

Questions:

1. I am not sure if i did the E0cell right equation, I switched the Ecell to get the E0cell..and "n" is equal to 2 moles being transfer?

I calculated:

Measured Ecell = 0.445V

Overall rxn = Cu(s)+Pb2(aq) ~ CU2+(aq) + Pb(s)

N= 2moles??

Re-arrange the equation:

E0cell = Ecell - RT/nF ln Q

E0cell = 0.445V -(8.314 j/k*mol *298K)/(2 moles * 96500 c/mole e-) ln (0.10)

= -2.30

2. Overall reaction:

3Pb(s) + 2Al 3+ (aq) ~ 3Pb2+(aq) = 2Al(s)

Measured Ecell(V) = 0.086V

N= 6moles?? (3*2 moles)

0.086V- (8.314 j/k*mol * 298K)/ (6moles * 96500 C/mole e- ) ln (0.10/0.10^6) = 0.94??

Is this right? Please help! Thank you in advance!

## Answer This Question

## Related Questions

- Chemistry - How to calculate Q in Nernst Equations, we used 0.10M solutions in ...
- Chemistry again - Two voltaic cells are to be joined so that one will run the ...
- chemistry - Calculate the cell potential of voltaic cells that contain the ...
- electrochemistry - Calculate the cell potential of voltaic cells that contain ...
- chemistry - A voltaic cell at 25oC consists of Mn/Mn2+ and Cd/Cd2+ half-cells ...
- Chemistry - The cell diagram for the lead-acid cell that is used in automobile ...
- Chemistry - 1) Assume that the reference half-cell is changed to a standard ...
- Chemistry - 1) Assume that the reference half-cell is changed to a standard ...
- chemistry - 1. If half cell A has a standard reduction potential of E= -1.10 V ...
- chemistry - Consider two cells, the first with Al and Ag electrodes, and the ...

More Related Questions