Cell potential?

Question

The solubility product constant for Ag2SO3 is 1.5x10^-14
Calculate E for the process

Ag2SO3(s) + 2e- === 2Ag(s) +SO3-2

i cant find the half cell of the sulfur reaction

Thanks for the help

Answer 1

You don't need it. Your equation is just for the Ag+/Ag half cell.

You need to find the solubility (mol/L) of the salt, double it to get the concentration of Ag+, and then use the standard potential of Ag+/Ag and the Nernst equation.