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In the test for a halide ion in aqueous solution, dilute nitric acid is added before the addition of silver nitrate solution - AQA - A-Level Chemistry - Question 15 - 2020 - Paper 3
Question 15
In the test for a halide ion in aqueous solution, dilute nitric acid is added before the addition of silver nitrate solution. Why is nitric acid added? A It increa... show full transcript
Worked Solution & Example Answer:In the test for a halide ion in aqueous solution, dilute nitric acid is added before the addition of silver nitrate solution - AQA - A-Level Chemistry - Question 15 - 2020 - Paper 3
Step 1
B It prevents the precipitation of silver compounds other than halides.
Answer
Dilute nitric acid is added to provide an acidic environment that helps to prevent the precipitation of other silver compounds, such as silver chloride, which can form if halide ions are present. This ensures that the silver ions can react selectively with the specific halide ions in solution without interference from other ions.