home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Epic Interactive Encyclopedia 1996
/
Epic Interactive Encyclopedia, The (1996)(Epic Marketing)[non-bootable].iso
/
e
/
electrolysis
/
infotext
< prev
Wrap
Text File
|
1992-09-02
|
867b
|
23 lines
Electrolysis in chemistry, is the production
of chemical changes by passing an electric
current through a solution or molten salt
(the electrolyte), resulting in the migration
of ions to the electrodes: positive ions
(cations) to the negative electrode (cathode)
and negative ions (anions) to the positive
electrode (anode).
During electrolysis, the ions react with the
electrode, either receiving or giving up
electrons. The resultant atoms may be
liberated as a gas, or deposited as a solid
on the electrode, in amounts that are
proportional to the amount of current passed,
as discovered by English chemist Michael
Faraday. For instance, when acidified water
is electrolysed, hydrogen ions (H+) at the
cathode receive electrons to form hydrogen
gas; hydroxide ions (OH-) at the anode give
up electrons to form oxygen gas and water.
Subject by: Robert Small