redox

redox: loss/gain of oxygen, and movement of electrons

reduction: loss of oxygen

oxidation: gain of oxygen

redox reaction: reaction where one substance is oxidised and another is reduced

reductant: substance that is oxidised, cause other substance to be reduced

oxidant: substance that is reduced, cause other substance to be oxidised

metal displacement reaction: metal w higher reactivity will displace a metal w lower reactivity, more reactive metals are stronger reductants and oxidise more readily, lower in ptable → lower ionisation energy → more reactive, metals (not metal ions) closer to bottom on rhs of table are more reactive and will displace metal ions above them on lhs of table

halogen displacement rx: more reactive halogen will displace a less reactive halogen from solution, more reactive halogens are stronger oxidants and are reduced more easily, higher in group - higher electron affinity - more reactive, top of lhs of reduction potential table more reactive than those below on lhs, reactive halogen become halide

disproportionation: some substances can be both oxidised and reduced simultaneously

displacement: a more reactive substance displaces a less reactive substance from solution. substance w the highest electron affinity removes electrons from substance w lower electron affinity