2 x 1 hour lessons

This module focuses on the chemistry of transition metal ions in aqueous solution. You’ll study their characteristic colours, their behaviour in ligand exchange reactions, and the reactions they undergo with key reagents such as hydroxide and ammonia. Particular attention is paid to recognising and interpreting the formation of precipitates, complex ions, and colour changes.

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By the end of this module you will be able to:

• describe and write ionic equations for the reactions of aqueous metal ions with OH⁻, NH₃, and CO₃²⁻

• explain ligand exchange and identify the conditions under which it occurs

• predict the appearance and identity of products formed in qualitative analysis of metal ions

• apply these reactions to analytical chemistry contexts, such as test-tube identification of unknown ions

AQA Specification Point: 2.13 Reactions of ions in aqueous solution