Question

MEDAL!!

What am I doing wrong?!?
What is the equilibrium constant for each of the following reactions?
Mg2+(aq) + Sn(s) --> Mg (s) + Sn2+(aq)

Co2+(aq) + Pb(s) --> Co(s) + Pb2+(aq)

Sn2+ + 2 e - Sn V= -.14
Mg2+ + 2 e - Mg V= -2.37
Co2++ 2 e - Co V= -.28
Pb2+ + 2 e - Pb V= -.13
E to the degree = .0257/ n x ln x K
solve for K
I can't figure out what n should be?

Answer 1

Help

Answer 2

Help?