Chapter 20, Problem 98A

Interpretation Introduction

Interpretation: Whether ${\text{NAD}}^{+}$ can oxidize ${\text{Fe}}^{2+}$ to ${\text{Fe}}^{3+}$ is to be found out.

Concept Introduction: ${\text{NAD}}^{+}$ stands for nicotinamide adenine dinucleotide ion which is a very good oxidant.

Answer to Problem 98A

  ${\text{NAD}}^{+}$ can oxidize ${\text{Fe}}^{2+}$ to ${\text{Fe}}^{3+}$ because ${\text{NAD}}^{+}$ is a good oxidizing agent with lower reduction potential than the ferrous ferric couple.

Explanation of Solution

The oxidation of NAD to ${\text{NAD}}^{+}$ is very difficult, therefore, ${\text{NAD}}^{+}$ becomes a very good oxidizing agent that can even oxidize ${\text{Fe}}^{2+}$ to ${\text{Fe}}^{3+}$ .

Conclusion

  ${\text{NAD}}^{+}$ is a very good oxidizing agent which can oxidize ferrous to ferric ion.