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Chemistry help?

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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. 

 

asked Apr 22, 2015 in CHEMISTRY by heather Apprentice

1 Answer

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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 image.

Anode :

Cathode :

Step 2:

Description of a Galvanic Cell :

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

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

Anode :            image

Cathode :          image

The cell potential image .

Solution :

Line notation of the chemical reaction is image.

The cell potential image .

answered Apr 22, 2015 by Lucy Mentor

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