Electrochemistry Calculator
Write your redox / cell reaction
Separate species with spaces around + and use = (or โ) between sides. Write ions like Cu+2, Cr2O7-2, MnO4- (pretty Cuยฒโบ works too). Balancing is checked with chempy; everything else is computed instantly.
Examples
Daniell cell
Mg | Feยฒโบ
dichromate + Feยฒโบ
permanganate titration
Cu + Agโบ
aluminium + Oโ
MnOโโป + Iโป (basic)
Standard reduction potentials (Eยฐ) reference
| Half-reaction (reduction) | Eยฐ (V) |
|---|
Click cathode / anode to drop a value into the cell-potential fields below.
โป Electrolysis โ Faraday's laws (mass deposited / gas evolved)
m = (QยทM)/(nยทF), Q = Iยทt, mol eโป = Q/F. Molar mass M is looked up from the formula. For a gas, the volume at STP (22.414 L/mol) is shown too.
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Frequently asked
Write the reaction and click Balance & analyze. chempy balances it and the tool reads each element's oxidation-state change to report n automatically. You can override n if your reaction is unusual.
Eยฐcell = Eยฐcathode โ Eยฐanode, with both values as standard reduction potentials. From Eยฐcell the tool also gives ฮGยฐ = โnFEยฐ and K = e^(nFEยฐ/RT).
Yes. Either include Hโบ/HโO (or OHโป) yourself, or set the Auto-add option to acidic or basic and the balancer adds them.
It gives the cell potential at non-standard concentrations/temperature: E = Eยฐcell โ (RT/nF)ยทln Q. Enter the species' concentrations and the tool computes Q and E.