Identify Anions

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A series of free IGCSE Chemistry Activities and Experiments (Cambridge IGCSE Chemistry).

Check with your syllabus to find which tests you will need to know for your examination.

The following table shows the tests for anions:
Carbonate, Chloride, Bromide, Iodide, Nitrate, Sulfate and Sulfite.

Identifying anions
Testing for anions:
carbonate - add dilute acid, carbon dioxide produced
sulfate - acidify, then add aqueous barium nitrate, white ppt.,
chloride - acidify with dilute nitric acid, then add aqueous silver nitrate, white ppt.,
iodide - acidify with dilute nitric acid, then add aqueous silver nitrate, yellow ppt.,
nitrate - add aqueous sodium hydroxide, then aluminium foil; warm carefully, ammonia produced

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Halide Ion Tests
chloride - acidify with dilute nitric acid, then add aqueous silver nitrate, white ppt.,
bromide - acidify with dilute nitric acid, then add aqueous silver nitrate, cream ppt.,
iodide - acidify with dilute nitric acid, then add aqueous silver nitrate, yellow ppt.,

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