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Thermodynamics/Chemistry Q about Nernst Equation

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Question
Hi Kevin,
My Question is:

You make a galvanic cell with a standard hydrogen electrode(H+) and a Cd2+/Cd electrode.

How would each of the following changes affect the cell potential (Nernst Equation)increase/decrease/no effect?

1.Add a solid base such as NaOH to the hydrogen electrode?
2.Increase the partial pressure of hydrogen gas.
3.Use a larger volume of the Cd2+ solution.
4.Decrease the concentration of Cd2+ ions.

I'm not too sure about my answer, plz help

Thanks a lot

Answer
Hi Alan,

This is to check out your understanding of the Nernst equation.

 E=Eo + 0.06/z  Log Aox/Ared

Eo and 0.06/z are effectively constant.

So what will the proposed changes do  to Aox and or Ared.

You need to know which is Aox and which Ared.

I hope this helps
Best wishes
Kevin

Thermodynamics

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Kevin

Expertise

Thermodynamics, chemistry, chemical reactions, kinetics, chemical reaction safety, dust explosion technology, static electricity. General science.

Experience

Over 40 years experience as a practicing thermochemist in industry. Head of the fire and explosion laboratory of a major European chemical company (Ciba-Geigy). Now retired.

Organizations
Institute of Chemical Engineers. Royal Society of Chemistry.

Education/Credentials
Chartered Chemist, Member of the Royal Society of Chemistry (C.Chem MRSC). Msc Sheffield.

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