the E°cell for the reaction:?

Question

Calculate the E°cell for the reaction below,
Tl+(aq) + 2 Cl-(aq) → 2 Tl(s) + Cl2(g)

given the following standard reduction potentials.

Cl2(g) + 2 e- → 2 Cl-(aq) E° = +1.36 V
Tl+(aq) + e- → Tl(s) E° = -0.34 V

a.-2.04 V
b.+1.70 V
c.+2.04 V
d.1.02 V
e.-1.70 V

Answer 1

e.-1.70 V

The chlorine portion is in the reverse direction of what is shown in the standard reduction potential so the sign reverses from + to - .