Aqueous silver nitrate is added to a solution of the halide. An insoluble precipitate of silver halide is formed. Silver chloride is white, silver bromide is cream-coloured and silver iodide is yellow. If silver nitrate is added to a sodium chloride solution:NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3Aqueous ammonia can be added to test the solubility of the precipitate. The chloride is soluble in dilute aqueous ammonia, the bromide is soluble in concentrated aqueous ammonia and iodide is insoluble in aqueous ammonia.
Test for Halide Ions
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Specification: OCR Chemistry A (H032), AS-level, 3.1.4 Qualitative analysis. Topic: Reactivity Trends.
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