Electrolysis mass calculator
Charge divided by the Faraday constant gives moles of electrons; the electron count per ion turns that into moles of metal.
A
g/mol
%
Mass deposited
2.370 99g
- Charge passed
- 7200 C
- Moles of electrons
- 0.074 622 7 mol
Show the working
- Current = 2
- Time = 3600
- Molar mass of the deposited element = 63.546
- Electrons per ion = 2
- Current efficiency = 100
- Charge passed = 2 * 3600 = 7200
- Moles of electrons = 7200 / Far = 0.074 622 7
- mol_metal = 0.074 622 7 / 2 = 0.037 311 4
- Mass deposited = 0.037 311 4 * 63.546 * 100 / 100 = 2.370 99
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- charge Q = I t
- mass = Q M / (z F), with F = 96485.33212... C/mol
Real plating efficiency is below 100% because some current goes into hydrogen evolution.