Chapter 18, Problem 18.21QP

(a)

Interpretation Introduction

Interpretation: The questions based on the electrochemical cell are to be answered.

Concept introduction: Voltaic cell is a type of electrochemical cell which converts the chemical energy to electrical energy. This chemical energy generates by processing the redox reaction. Redox reaction is the combination of two half reactions that are oxidation half and reduction half.

Oxidation is a process in which loss of electrons take place, while in reduction gain of electron take place. In voltaic cell during the process of redox reaction electrons are generated on anode and then transfer to the cathode by the external circuit. In this way we can say that the process of oxidation occurs at the anode and the process of reduction occurs at cathode and hence, electron flows.

To determine: The half reactions for anode and cathode for the given reaction between ${\text{Ni}}^{2+}\left(aq\right)$ and $\text{Cd}\left(s\right)$ that produces $\text{Ni}\left(s\right)$ and ${\text{Cd}}^{2+}\left(aq\right)$.

(b)

Interpretation Introduction

To determine: The net ionic balanced equation for describing the cell reaction.

(c)

Interpretation Introduction

To determine: The cell diagram for the above reaction.