Chemguide: Support for CIE A level Chemistry


Learning outcome 24: Electrochemistry

24.1: Electrolysis


Learning outcomes 24.1.2 and 24.1.3

Theses statements deal with the Faraday constant and electrolysis calculations.

Before you go on, you should find and read the statements in your copy of the syllabus.


You will find what you need on the page Basic Electrolysis Calculations.

The syllabus statement 24.1.3(a) talks about the quantity of electricity being passed using the equation:

Q = I x t

(The I is an upper case i.)

That isn't specifically mentioned on that page, but translating the equation into words is simply:

number of coulombs = current (in amps) x time (in seconds)

Q is the quantity of electricity measured in coulombs.


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© Jim Clark 2020