2.1.5 redox
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give the words for OIL RIG
Oxidation Is Loss Reduction Is Gain
when a substance is oxidised the oxidation number…
increases
when a substance is reduced the oxidation number…
decreases
hydrogen has a charge of +1 except…
in metal hydrides where is is -1 eg NaH
Cl, Br and I have oxidation numbers of -1 except…
in compounds with oxygen or fluorine
Oxygen had an oxidation number of -2 except…
in peroxides when it is -1, and in compounds with fluorine
an oxidising agent is …
an electron acceptor
a reducing agent is…
an electron donor
a redox reaction must include…
one species being oxidised and one species being reduced
a disproportionation reaction includes…
one element being simultaneously oxidised and reduced
in potassium sulfate (VI) what does ‘(VI)’ refer to ?
the oxidation state