gcsescience.com 7 gcsescience.com
Extraction of Metals
Electrolysis of Magnesium Chloride.
chloride must be
heated until it is molten
before it will conduct electricity. Electrolysis
separates the molten ionic compound into its elements.
The half equations are
Mg2+ + 2e-
metal at the (-)cathode).
2Cl- - 2e- Cl2 (chlorine gas at the (+)anode).
electrons (reduction) to form
Chloride ions lose electrons (oxidation) to form chlorine atoms.
The chlorine atoms combine to form molecules of chlorine gas.
The overall reaction is
MgCl2(l) Mg(s) + Cl2(g)
See some other examples of electrolysis.
Links Electrolysis Revision Questions
gcsescience.com The Periodic Table Index Metal Quiz gcsescience.com
Home GCSE Chemistry GCSE Physics
Copyright © 2015 Dr. Colin France. All Rights Reserved.