Answer to Question #346237 in General Chemistry for Señor

Question

Determine if each of the following redox reactions is spontaneous or not.

1. Cu + 2Ag+ ⟶ Cu2+ + 2Ag

2. Al3+ + Fe ⟶ Al + Fe2+

3. Zn + Ni2+ ⟶ Zn2+ + Ni

4. 3Pb + 2Au3+ ⟶ 3Pb2+ + 2Au

5. Hg + Pb2+⟶ Hg2+ + Pb

Answer 1

According to the voltage range of the metals above, any metal can squeeze any metal located next it (right) out of its salt solution.

1. Cu + 2 Ag⁺ = Cu²⁺ + 2 Ag spontaneous

2. Al³⁺ + Fe = Al + Fe²⁺ not spontaneous

3. Zn + Ni²⁺ = Zn²⁺ + Ni spontaneous

4. 3Pb + 2Au³⁺ = 3Pb²⁺ + 2Au spontaneous

5. Hg + Pb²⁺ = Hg²⁺ + Pb not spontaneous