Problem: Based on the sign of E°cell, classify these reactions as spontaneous or nonspontaneous as written.  Assume standard conditions.3Fe2+(aq) + 2Cr(s) → 3Fe(s) + 2Cr3+(aq) Al3+(aq) + 3Na(s) → Al(s) +3Na+(aq)Zn2+(aq) + Sn(s) → Zn(s) + Sn2+(aq)

FREE Expert Solution

a. 3 Fe2+(aq) + 2 Cr(s) ⟶ 3 Fe(s) + 2 Cr3+(aq)

Oxidation:  2Cr3+(aq) + 6e  ⟶  2Cr(s)            E° = -0.73V

Reduction:  3 Fe2+(aq)+ 6e ⟶ 3Fe(s)             E°= −0.45V

View Complete Written Solution
Problem Details

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

3Fe2+(aq) + 2Cr(s) → 3Fe(s) + 2Cr3+(aq) 

Al3+(aq) + 3Na(s) → Al(s) +3Na+(aq)

Zn2+(aq) + Sn(s) → Zn(s) + Sn2+(aq)

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Cell Potential concept. If you need more Cell Potential practice, you can also practice Cell Potential practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofBased on the sign of E°cell, classify these reactions as spo...as medium difficulty.