Faraday Law Calculator
Faraday law calculator
Estimate deposited mass from electrolysis current and time.
InputsChemistry4 fieldsLive
Result
2.37098837 g
Uses m = (I × t × M)/(n × F).
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Formula
m = (I x t x M)/(nF) Symbol legend
| Symbol | Meaning | Unit | Copy |
|---|---|---|---|
m | Deposited or dissolved mass | g | |
I | Current | A | |
t | Time | s | |
M | Molar mass | g/mol | |
n | Electrons transferred per ion | integer | |
F | Faraday constant | C/mol |
- Multiply current by time to get charge.
- Scale by molar mass and divide by nF.
- Result gives expected mass in grams.
Example
Worked example: Cu deposition
- 1 I = 2 A, t = 3600 s, M = 63.546 g/mol, n = 2
- 2 m = (ItM)/(nF)
- 3 m ≈ 2.371 g
Expected deposited mass is about 2.371 g.
How
- Enter current, time, molar mass, and electron count.
- Ensure all values are positive and n is an integer.
- Read expected mass output.
Avoid
- Using minutes for time without converting to seconds.
- Using wrong electron count for the ion reduction step.
- Confusing atomic mass units with g/mol input.
Ref only. Verify values. Follow lab safety.
FAQ
Does 100 percent current efficiency assumed?
Yes, this ideal form assumes full current efficiency.
Can I use this for gas evolution calculations?
Yes, if molar mass and electron stoichiometry are defined correctly.
What unit should time be in?
Time should be entered in seconds.
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