Testing for chlorides (Cl^-), bromides (Br^-) and iodides (I^-)
1 mark · EasyState the reagent that must be added to a solution before silver nitrate to test for chloride, bromide, or iodide ions.
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dilute nitric acid
Also accept: nitric acid; dilute HNO3
Common mistakes: hydrochloric acid; just 'acid'
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Marking points
B1 · 1 mark · States 'dilute nitric acid' or 'nitric acid' as the reagent to add before silver nitrate.
Worked solution
Before adding silver nitrate, you must add dilute nitric acid to the solution.