This unit uses ideas developed in the key stage 2 programme of study. It builds on
unit 6C 'More about dissolving' and
unit 6D 'Reversible and irreversible changes' in the key stage 2 scheme of work.
This unit introduces pupils to chemicals, reactions and practical techniques which are likely to be new to them, through using a range of acids and alkalis encountered in familiar and laboratory contexts. It lays the foundation for work on reactions of acids in unit 9E 'Reactions of metals and metal compounds' and work on carbonate rocks in unit 8G 'Rocks and weathering' and unit 8H 'The rock cycle'.
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