Question

Electromotive force (EMF) of a cell is

• A. potential required to oxidize one mole of ions.
• B. Potential difference between electrode and electrolyte in a cell.
• C. difference between the reduction potential of cathode and anode.

Answer 1

Answer: (C)

difference between the reduction potential of cathode and anode.

The electromotive force (EMF) is the maximum potential difference between two electrodes of a galvanic or voltaic cell. This quantity is related to the tendency for an element, a compound or an ion to acquire (i.e. gain) or release (loss) electrons. Despite its name, electromotive force is not actually a force. It is commonly measured in units of volts
Lds :
1. EMF
2. Reduction potential and oxidation potential
3. Electrode potential