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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.

##### Solution Summary

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

##### Solution Preview

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= ...

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