Concentration potentials (Nernst equation)

VC4.4.3.4

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Description

If two similar half-cells which differ only in the concentration c of their electrolyte solutions are combined, then a potential difference also forms between those half-cells. The general relationship is described in the Nernst equation:

The potential E therefore depends on the temperature in Kelvin T and on the proportionality factor R, the universal gas constant. Other parameters which play a role include the ion valence n and the Faraday constant F. The dependence on concentration and temperature are investigated in experiment C4.4.3.4.

Components of equipment sets

1	6644071 8	Electrochemistry demonstration unit, CPS
1	664401 4	Electrochemistry accessories set
1	666425 4	Panel frame C50, two-level, for CPS
1	666472 4	Table for electrochemistry, CPS
1	665754 4	Measuring cylinder 100 ml, with plastic base
3	602023 4	Beaker, Boro 3.3, 150 ml, squat
1	664115 4	Beaker, DURAN, 600 ml, tall
1	665212 4	Glass stirring rod 200 x 8 mm Ø
3	665997 4	Graduated pipette 10 ml
1	666003 4	Pipetting ball (Peleus ball)
1	6753400 4	Water, pure, 1 l
1	6729660 4	Copper(II) sulfate solution, 1 mol/l (15 %), 500 ml Danger H318 H400 H410
1	6738411 4	Sodium hydroxide solution, 0.1 mol/l, 1 l Warning H290

Experiment Instructions

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C4.4.3.4 Concentration potentials (Nernst equation)

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Concentration potentials (Nernst equation)

Description

Components of equipment sets

Experiment Instructions

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