Tests for ions 0.0 / 5 ? ChemistryIonsA2/A-levelOCR Created by: freyasellersCreated on: 04-06-18 09:23 Carbonates Addition of a dilute acid e.g. dilute HCl will give off carbon dioxide, which turns limewater cloudy 1 of 5 Sulfates Adding HCl and barium chloride forms the white precipitate barium sulfate. 2 of 5 Halides Add nitric acid to prevent false results then add silver nitrate and a precipitate will form. 3 of 5 Ammonium compounds Ammonia gas turns red litmus paper blue; ammonium ions will give off ammonia when reacted with NaOH 4 of 5 Order of tests to avoid mix-ups Carbonates, sulfates, halides 5 of 5
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