Nernst Equation Chemistry Notes

Nernst Equation Chemistry Notes

Nernst Equation :

Nernst Equation for Electrode Potential-Let an electrode reaction is as follow:

Nernst Equation Chemistry Notes 1

For this reaction, electrode potential measured in relation with standard hydrogen electrode at any concentration can be represented as below:

Nernst Equation Chemistry Notes 2

Here, n = Number of electrons.

Nernst Equation Chemistry Notes

→ Effect of Temperature and Concentration of Electrolyte on Cell Potential or Nernst Equation for Cell Potential-Let, cell potential for following Galvanic cell is determined

Nernst Equation Chemistry Notes 3

→ Ecell depends on concentration of both ions, Cu2+ and Zn2+. It increases with the increase in concentration of Cu2+ ions and decreases with the increase in concentration of Zn2+ ions. If this equation is applied to a normal redox reaction in which n electrons are used, then

Nernst Equation Chemistry Notes 4

Here, concentration of all solid metals is taken as 1 mol L-1 and concentration of ions is measured in mol L-1 Here, n = number of electrons.

Chemistry Notes

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