Posted by **sabrina** on Friday, November 30, 2012 at 11:23pm.

Use the Nernst equation and data from Appendix D to calculate Ecell for each of the following cells.

Enter your answer with 3 significant digits.

Enter scientific notation as 1.23E4.

(a) Mn(s) | Mn2+(0.11) M || Cr3+(0.24 M), Cr2+(0.11 M) | Pt(s)

____________

(b) Mg(s) | Mg2+(0.070) M || [Al(OH)4]–(0.30 M), OH–(0.040 M) | Al(s)

- CHEMISTRY -
**DrBob222**, Friday, November 30, 2012 at 11:48pm
a) Mn(s) | Mn2+(0.11) M || Cr3+(0.24 M), Cr2+(0.11 M) | Pt(s)

1. Calculate4 the Mn^2+ + e ==> Mn couple.

E = Eo - 0.0592/n)*log(red/(ox)

E = Eo-(0.0592/n)*log[Mn(s)]/(Mn^2+)

E = Eo = (0.0592/2)*log[(1)/(0.11)]

You will need ot look up Eo for this REDUCTION, calculate E for the half cell, then change the sign since this is an oxidation.

Do the same for the Cr^3+ + e ==> Cr^2+

Then EMn as oxidation + ECr as redn = Ecell.

## Answer this Question

## Related Questions

- CHEMISTRY - Use the Nernst equation and calculate Ecell for each of the ...
- CHEMISTRY - Use the Nernst equation to calculate Ecell for each of the following...
- CHEMISTRY - A concentration cell is constructed of two hydrogen electrodes. The ...
- CHEMISTRY - cell diagram:H2(g,1atm) Pt Enter part(a), (c) with 2 siginificant ...
- CHEMISTRY - Enter part(a), (c) with 2 siginificant digits and part(b) with 3 ...
- Chemistry - Using your experimental data, calculate E0cell. Standard voltaic ...
- Any chemistry lovers? - A voltaic cell consists of Mn/Mn2+ and Cd/Cd2+ half-...
- math - Calculate the value of the following in exponential form, using standard...
- Chemistry - How to calculate Q in Nernst Equations, we used 0.10M solutions in ...
- chemistry - A voltaic cell at 25oC consists of Mn/Mn2+ and Cd/Cd2+ half-cells ...