3.2 redox reactions
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13 Terms
define oxidation
loss of electrons
define reduction
gain of electrons
what is an oxidising agent?
a substance which causes another species to be oxidised by taking electrons from it
what happens to an oxidising agent?
it gets reduced
what is a reducing agent?
a substance which causes another species to be reduced by donating electrons to it
what happens to a reducing agent?
it gets oxidised
how do you write half equations?
write ions
balance oxygen with H2O
balance hydrogen with H+
balance charge with electrons
what is the oxidation number for group 1?
always +1
what is the oxidation number for group 2?
always +2
what is the oxidation number for oxygen?
-2 (except peroxides (-1) and F2O (+2))
what is the oxidation number for hydrogen?
+1 (except metal hydrides (-1))
what is the oxidation number for fluorine?
always -1
what is the oxidation number for chlorine?
-1 (except compounds with O or F)