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Determination of the Faraday constant

Determination of the Faraday constant

VC4.4.5.2_p

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Description

In electrolysis, the electrical conduction processes are linked to a material deposition. The quantity of material deposited is proportional to the transported charge Q which flowed through the electrolyte. In this respect, the process is an application of Faraday's law.

z = valency number of ions of the substance

F = Faraday constant

Experiment C4.4.5.2 determines the Faraday constant F. For this purpose, a Hofmann voltameter is used to produce a certain quantity of hydrogen. The number of moles n of hydrogen atoms deposited can be calculated from the volume V using the ideal gas equation. At the same time, the amount of electrical charge Q required for this can be determined from the electrical work W.

The experiment can be conducted using CPS or standard stand material.

Components of equipment sets

1	666446	Electrolysis apparatus, CPS
1	666425 4	Panel frame C50, two-level, for CPS
1	38235 4	Thermometer, -10...+50 °C/0.1 K
1	531831 8	Joule and wattmeter
1	521546 4	DC Power Supply 0...16 V/0...5 A
1	500441 4	Connecting lead 19 A, 100 cm, red
1	500442 4	Connecting lead 19 A, 100 cm, blue
1	500421 4	Connecting lead 19 A, 50 cm, red
1	500422 4	Connecting lead 19 A, 50 cm, blue
1	665755 4	Measuring cylinder 250 ml, with plastic base
1	6747920 4	Sulfuric acid, diluted, approx. 2 N (= 10 %), 500 ml Warning H290 H315 H319

Experiment Instructions

PDF (Experiment description)

C4.4.5.2 Determination of the Faraday constant

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Determination of the Faraday constant

Description

Components of equipment sets

Experiment Instructions

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