Determination of the Faraday constant

VC4.4.5.2_p
Determination of the Faraday constant
Determination of the Faraday constant

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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 LD
1 666425  4  Panel frame C50, two-level, for CPS LD
1 38235  4  Thermometer, -10...+50 °C/0.1 K LD
1 531831  8  Joule and wattmeter LD
1 521546  4  DC Power Supply 0...16 V/0...5 A LD
1 500441  4  Connecting lead 19 A, 100 cm, red LD
1 500442  4  Connecting lead 19 A, 100 cm, blue LD
1 500421  4  Connecting lead 19 A, 50 cm, red LD
1 500422  4  Connecting lead 19 A, 50 cm, blue LD
1 665755  4  Measuring cylinder 250 ml, with plastic base LD
1 6747920  4  Sulfuric acid, diluted, approx. 2 N (= 10 %), 500 ml LD
GHS05 Warning H290 H315 H319

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) C4.4.5.2 Determination of the Faraday constant
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