Technical data

Determination of Faraday's constant

Article no: P3062102

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> Unknown

Principle

Faraday's laws of electrolysis describe the correlation between the amounts of substances transformed in the reactions at the electrodes and the charge applied (amount of electricity). Faraday's constant, which appears as a proportionality factor, can be determined experimentally from the dependence.

Benefits

Standard experiment in introductory physics and chemistry
Failsafe and elegant determination of an important natural constant
Excellent for the introduction of refractometry

Tasks

Determine Faraday's constant from the dependence of the volumes of hydrogen and oxygen envolved on the charge applied in the hydrolysis of dilute sulphuric acid.

Learning objectives

Electrolysis coulometry
Charge
Faraday's laws
Avogadro's number
General equation of state for ideal gases

Necessary accessories

Precision balance 620g/0.001g

Scope of delivery

PHYWE Power supply, universal, analog display DC: 18 V, 5 A / AC: 15 V, 5 A	13503-93	1
Water decomposition apparatus according to Hoffmann, incl. tripod	MAU-25014002	1
PHYWE Digital multimeter, 600V AC/DC, 10A AC/DC, 20 MΩ, 200 µF, 20 kHz, −20°C…760°C	07122-00	1
On/off switch	06004-00	1
Connecting cable, 32 A, blue, various lengths	07362-04	1
Connecting cable, 32 A, red, various lengths	07361-01	1
Connecting cable, 32 A, red, various lengths	07360-01	2
Right angle boss-head clamp	37697-00	2
Universal clamp	37715-01	2
Digital stopwatch, 24 h, 1/100 s and 1 s	24025-00	1
Weather monitor with big display	87997-10	1
Beakers, Boro, low form, various sizes	46056-00	1
Pasteur pipettes, 250 pcs	36590-00	1
Rubber caps, 10 pcs	39275-03	1
Funnels (glass), Boro, various sizes	34459-00	1
Wash bottle, plastic, 500 ml	33931-00	1
Sulphuric acid, 95-97%, 500 ml	30219-50	1