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# Cell diagram for Galvanic cells

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1. Calculate the value of ?G for the galvanic cell described in problem 1.

2. How many mL of .1000 M sodium hydroxide must be added to 500 mL of .1000 M formic acid to prepare a buffer solution with a pH of 4.00?

Problem 1

Write the cell diagram for a galvanic cell consisting of a silver electrode in contact with .300 M silver nitrate solution and a copper electrode in contact with a .500 M copper nitrate solution.

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#### Solution Preview

Please see the attached file.

The cell can be drawn as shown above

The cell reaction can be written as

EMF of the cell can be calculated as Ecell= EL - ER

Ecell = 0.3-0.8
Ecell= -0.5

EMF of the cell at 250C can be calculated using Nernst equation

Ecell = E0cell - 0.0591/nlog [oxidized]/[Reduced]

Ecell= -0.5-0.0591/2log [0.5]/[0.6]

Ecell= ...

#### Solution Summary

The solution calculates the value of ?G for the galvanic cell described in problem 1.

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