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Different definition of oxidation and reduction

Iupac seems to use the same definition.
Of or relating to such a reaction.
A chemical reaction in which one or more electrons are transferred from one atom or molecule to another : a chemical reaction in which one or more electrons are transferred from one atom or molecule to another called rectorat grenoble recrutement sans concours also oxidoreduction, redox.
CuO is idee cadeau fille 14 ans the oxidant, while H2 is the reductant.They therefore act as oxidizing agents, and become reduced.Collins English Dictionary - Complete Unabridged 2012 Digital Edition.The reducing agent cadeaux bio equitable (reductant which is oxidized increases in oxidation number (i.e., loss of electrons increases oxidation number).They reduce their counterparts in redox reactions by donating electrons to them, while they themselves become oxidized (i.e.Examples, F2, O2, Cl2.H2S is the reducing agent.Increase in oxidation number).CuO adds oxygen to H2; CuO is therefore the oxidizing agent or oxidant, it oxidizes the H2 to H2O.Fluorine removes hydrogen from the water, therefore, fluorine is the oxidant.A reversible chemical process usually involving the transfer of electrons, in which one reaction is an oxidation and the reverse reaction is a reduction.The more formal "official" (according to iupac) definition is intended to get as close to the underlying physics as possible.It looks like organic chemistry books often use the addition of oxygen to identify oxidation, and the addition of hydrogen or the removal of oxygen to identify reduction.
Reduction Reaction, reduction reactions can be defined as reactions that involve the removal of oxygen or the addition of hydrogen.
The oxidizing agent (oxidant which is reduced decreases in oxidation number (i.e., acceptance of electrons reduces oxidation number).

2H2O(l) 2F2(g) 4HF(aq) O2(g h2O here adds hydrogen to F2, thereby reducing it.