Why is dilute nitric acid added to test for chloride
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Explain why, in a test for halide ions, the sample is acidified with dilute nitric acid first. Carbonate ions also produce a white precipitate with silver nitrate solution.
The acid reacts with any carbonate ions present. This removes them, so stopping them giving an incorrect positive result for chloride ions.
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Explanation:
Explain why, in a test for halide ions, the sample is acidified with dilute nitric acid first. Carbonate ions also produce a white precipitate with silver nitrate solution. The acid reacts with any carbonate ions present. This removes them, so stopping them giving an incorrect positive result for chloride ions.
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