Chemistry - Chapter 24: Electrochemistry

Electrode potential

The voltage measure for a half-cell compared with another cell. Shows how easily a substance can be reduced

Standard hydrogen electrode

A half-cell in which H₂ gas at pressure 101 kPa bubbles through a solution of 1 mol.dm^-3 of H⁺ ions

Standard electrode potential

The voltage produced when a standard half-cell is connected to a standard hydrogen electrode under SD

Standard cell potential

The difference in standard electrode potential between 2 specific half-cells

Half-cell

One half of an electrochemical cell which either donates or receives electrons from an external circuit when connected to another half-cell

Electrolysis

The decomposition of an ionic compound when it is a molten/aqueous solution by an electric current

Electrolyte

A molten ionic compound or an aqueous solution of ions that is decomposed during electrolysis

Electrodes

A rod of metal or carbon (graphite) which conducts electricity to or from an electrolyte

Anode

The positive electrode

Cathode

The negative electrode

Faraday

The quantity of electric charge (in coulombs) carried by one mole of electrons or one mole of singly charged ions