Part 1 Redox equilibria: more about oxidation numbers - using oxidation numbers to balance difficult equations; electrode potentials - reduction potentials and the feasibility of reactions, when does a feasible reaction not happen?, disproportionation, non-standard conditions, cells, representing electrodes and cells, practical cells and batteries (storage cells); titrations - potassium manganate (VII) titrations, sodium thiosulphate titrations; corrosion - rusting, corrosion of other metals, sacrificial protection, tinning; questions. Part 2 Transition metals: the d-block and transition metals; electronic structures and variable oxidation numbers; formation of complex ions - complex formation and colour, the action of alkali on aqua complexes; vanadium; iron; catalytic activity and the transition metals; questions. Part 3 Benzene - the basis of aromatic compounds: structure of benzene - the Kekule approach, the molecular orbital approach; thermochemical evidence for the structure of benzene.