Half cell
Encyclopedia : H : HA : HAL : Half cell
A half cell is a structure that contains an electrode and a surrounding electrolyte. A standard half cell, used in electrochemistry, consists of a metal electrode in a 1 molar aqueous solution of the metal's salt, at 298 Kelvin (25o Celsius). The electrochemical series, which consists of standard electrode potentials and is closely related to the reactivity series, was generated by measuring the between the metal half cell in a circuit with a standard hydrogen half cell, connected by a salt bridge.
The half cell of a Daniell Cell:
Zn + Cu+² -> Zn+² + Cu :Original equation Zn -> Zn+² + 2e- :Half Cell of Zn Cu+² - 2e- -> Cu :Half Cell of Cu
From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.