Question

Which of the following is the SOA (strongest oxidizing agent) according to the redox table? 

1. Cu⁺
2. Cu
3. Cu²⁺
4. Cu³⁺

Answer 1

Solution:

1) Cu⁺(aq) + e⁻ → Cu(s), E^o = +0.52 V

2) Cu(s) - 2e⁻ → Cu²⁺(aq), E^o = -0.34 V

3) Cu²⁺(aq) + 2e⁻ → Cu(s), E^o = +0.34 V

4) Cu³⁺(aq) + 2e⁻ → Cu⁺(aq), E^o = +1.28 V

Cu³⁺ is the most effective oxidizer, having the largest positive electrode potential. 

Answer: Cu³⁺ is the strongest oxidizing agent.