Chemistry help?

Question

You make a galvanic cell at 25°C containing:  A nickel electrode in 1.0 M Ni2+(aq)
 A silver electrode in 1.0 M Ag+(aq)

Use the line notaTion to describe the cell, labeling the anode and cathode, showing the direction of the electron flow, and calculate the cell potential. 

 

Answer 1

Step 1:

A voltaic cell is constructed using Nickel and silver.

A galvanic cell is constructed using following reaction:

.

Intermediate reactions :

As Nickel (Ni) looses two electrons, it acts as cathode.

As Silver (Ag) gains one electrons, it acts as anode.

Line notation :

Line notation is used to describe electrochemical cells.

According to line notation :

Anode components are listed on the left.

Cathode components are listed on the right.

They are separated by double vertical lines which indicate salt bridge or the porous disk.

Line Notation of the chemical reaction is .

Anode :

Cathode :

Step 2:

Description of a Galvanic Cell :

The cell potential (always positive for a galvanic cell) where  .

The direction of electron flow obtained by inspecting the half reactions and using the direction that gives a positive cell potential.

Anode :           

Cathode :         

The cell potential .

Solution :

Line notation of the chemical reaction is .

The cell potential .