A voltaic cell converts chemical energy into electrical energy. the conversion of chemical energy takes place in the modern cells
Half-cell
contains the chemical species present in a redox half-equation. a voltaic cell can be made by connecting together two different half cells which allows electrons to flow
metal ion half cell
The simplest half-cell consists of a metal rod dipped into a solution of its aqueous metal ion
Ion half cell
Contains ions of the same element in different oxidation states
Standard for electrode potential
The tendency to be reduced and gain electrons is measured as a standard electrode potential
Standard conditions
Concentration of 1moldm-3, temperature of 298K and pressure of 100KPa
Standard hydrogen electrode
The e.m.f of a half cell connected to a standard hydrogen half cell under standard conditions
Salt bridge
Concentrated solution of an electrolyte that doesn’t react with either solution
Electrode potential
Quantify the tendency of redox systems to gain or lose electrons
