A voltaic cell is constructed in which one half-cell consists of a silver wire in an aqueous solution of AgNO₃.The other half cell consists of an inert platinum wire in an aqueous solution containing Fe²⁺(aq) and Fe³⁺(aq).

1. (a) Calculate the cell potential, assuming standard conditions.
2. (b) Write the net ionic equation for the reaction occurring in the cell.
3. (c) Which electrode is the anode and which is the cathode?
4. (d) If [Ag⁺] is 0.10 M, and [Fe²⁺] and [Fe³⁺] are both 1.0 M, what is the cell potential? Is the net cell reaction still that used in part (a)? If not, what is the net reaction under the new conditions?

Interpretation:

The cell potential, assuming standard conditions has to be determined.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        ↓Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________            ↓                      ↓     Half cell             Half cell

First let’s write the half cell reaction:

At anode:Oxidation : Fe2+(aq) → Fe3+(aq) + e-Atcathode:Reduction: Ag+(aq) + e- →Ag(s)

Let’s write the reduction potentials at standard conditions:

Fe2+(aq) →Fe3+(aq) + e- ; E0= 0

Interpretation:

The net ionic equations for the reaction occuring in the cell has to be determined.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        ↓Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________            ↓                      ↓     Half cell             Half cell

Interpretation:

The anode and the cathode has to be identified.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        ↓Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________            ↓                      ↓     Half cell             Half cell

Interpretation:

The cell potential in the overall cell reaction and the net reaction under the new conditions has to be determined.

Concept introduction:

Voltaic cell or Galvanic cell:

The device to produce electricity by using chemical reactions. In these divces are redox chemical reactions are occured.

A voltaic cell converts chemical energy into electrical energy.

It consists of two half cells. Each half cell consists of a metal and a solution of a salt of metal. Two half cells are connected by salt bridge.

The chemical reaction in the half cell is an oxidation reduction (redox)reactions.

For example:

Cell diagram of voltaic or galvanic cell is as follows.

                 Salt bridge                        ↓Cu(s)|Cu2+(aq)  ||  Ag+(aq)|Ag(s)____________     ___________            ↓                      ↓     Half cell             Half cell