Faraday’s Law of Electrolysis Calculator
🔋 Rates & Electrochemistry. Use the Faraday’s law of electrolysis formula to find mass deposited, current, time, molar mass, charge on the ion z: pick the value you want, type the others, and the answer updates as you go.
F = 96 485 C/mol. z = the charge on the ion (2 for Cu²⁺).
Pick the ○ next to the value you want to find, fill in the others, and it solves as you type.
What each letter means
| Quantity | Unit |
|---|---|
| Mass deposited | g |
| Current | A |
| Time | s |
| Molar mass | g/mol |
| Charge on the ion z | no unit |
Worked example
Find the mass deposited when Current = 2 A, Time = 1800 s, Molar mass = 63.5 g/mol, Charge on the ion z = 2.
Using m = (I t M)/(z F): Mass deposited = 1.1846 g.
Frequently asked questions
What is the formula for Faraday’s law of electrolysis?
m = (I t M)/(z F). F = 96 485 C/mol. z = the charge on the ion (2 for Cu²⁺).
What do the letters stand for, and what units are used?
Mass deposited in g, Current in A, Time in s, Molar mass in g/mol, Charge on the ion z.
How do you calculate mass deposited?
Put the values into m = (I t M)/(z F). For example, with Current = 2 A, Time = 1800 s, Molar mass = 63.5 g/mol, Charge on the ion z = 2, mass deposited = 1.1846 g.
Can I solve for a different value?
Yes. In the calculator above, pick the circle next to any value (mass deposited, current, time, molar mass, charge on the ion z) and fill in the others: it rearranges the formula for you.
