Preferred Label : oxidized species;
IUPAC definition : A term used to characterize the degree of oxidation (or reduction) in atoms, molecules
and ions. It can be applied to an atom in a molecule or an ion which has a high oxidation
state. An element or atom in a compound can be oxidized by reaction with oxygen, while
it can be reduced by reaction with hydrogen. An oxidized species may be formed also
through the loss of electrons (either to the positive electrode in a cell, or through
transfer to another atom or group of atoms). For example, the sulfur in H sub 2 /sub
S is reduced sulfur relative to elementary sulfur, while SO sub 2 /sub and SO sub
3 /sub are oxidized. Metallic iron (Fe) is a reduced state of iron, while the Fe
sup 2 /sup ion (ferrous ion) and Fe sup 3 /sup ion (ferric ion) are oxidized states
of iron. Fe sup 3 /sup is in a higher oxidation state than Fe sup 2 /sup which
is in a higher oxidation state than Fe.;
Origin ID : O04369;
See also
A term used to characterize the degree of oxidation (or reduction) in atoms, molecules
and ions. It can be applied to an atom in a molecule or an ion which has a high oxidation
state. An element or atom in a compound can be oxidized by reaction with oxygen, while
it can be reduced by reaction with hydrogen. An oxidized species may be formed also
through the loss of electrons (either to the positive electrode in a cell, or through
transfer to another atom or group of atoms). For example, the sulfur in H sub 2 /sub
S is reduced sulfur relative to elementary sulfur, while SO sub 2 /sub and SO sub
3 /sub are oxidized. Metallic iron (Fe) is a reduced state of iron, while the Fe
sup 2 /sup ion (ferrous ion) and Fe sup 3 /sup ion (ferric ion) are oxidized states
of iron. Fe sup 3 /sup is in a higher oxidation state than Fe sup 2 /sup which
is in a higher oxidation state than Fe.
