In a battery,the following two oxidation-reduction reactions are taking place: rxn A: Zn → Zn⁺² + 2e^-
Rxn B: 2 NH₄⁺ + 2e^- → 2 NH₃ + H₂
Which reaction is taking place at the cathode?

Question

In a battery,the following two oxidation-reduction reactions are taking place: rxn A: Zn → Zn⁺² + 2e^- Rxn B: 2 NH₄⁺ + 2e^- → 2 NH₃ + H₂ Which reaction is taking place at the cathode?

Quizplus · Accepted Answer

Oxidation-reduction reactions involve the transfer of electrons from one chemical species to another. In a battery, the anode is where oxidation occurs (loss of electrons) and the cathode is where reduction occurs (gain of electrons). In this case, reaction B involves the gain of electrons, so it is taking place at the cathode.

In a Battery,the Following Two Oxidation-Reduction Reactions Are Taking Place