Determine the standard potential for each cell and identify the reactions as spontaneous or nonspontaneous as written. Hg2+(aq) + 2Cu(aq) → 2Cu2+(aq) + Hg

Answer 1

Hg²⁺(aq) + 2Cu(aq) → 2Cu²⁺(aq) + Hg

See my previous answer to your similar question.

Cu²⁺ + 2e- ==> Cu Eº = 0.34 V

Hg²⁺ + 2e- ==> Hg Eº = 0.85 V

Eº = 0.85 - 0.34 = 0.51 SPONTANEOU AS WRITTEN