Based on the sign of the standard cell potential, E°cell, classify these reactions as spontaneous or nonspontaneous as written

Question

Based on the sign of the standard cell potential, E°cell, classify these reactions as spontaneous or nonspontaneous as written. Assume standard conditions. Refer to the list of standard reduction potentials.

Zn^2+(aq) +Sn(s) → Zn(s) + Sn^2+(aq)

Ni^2+(aq) + S^2-(aq) → Ni(s) + S(s)

Al^3+(aq) + 3Na(s) → Al(s) + 3Na^+(aq)

Answer 1

Now that you know how to calculate the Eº_cell for a galvanic cell (see my previous answer to your question about X and Y being anode and cathode), you should be able to use the values of standard reduction potentials found in the table to calculate Eº_cell for the three conditions given. (Hint: the cathode will be the one with the more positive reduction potential).

Once you've calculated the Eº_cell for each, if the value is POSITIVE, it will be spontaneous. Otherwise, it will not be spontaneous.