A student is identifying the anions in a sample of runoff water from a chemical plant. To test for halide ions, the student acidifies the sample with dilute nitric acid and then adds aqueous silver nitrate. A cream-coloured precipitate, ZZZ, is formed.
Which of the following is the correct chemical formula and state symbol of precipitate Z Z\,Z in the chemical equation for this qualitative test?
AgBr2(s)\text{AgBr}_2(\text{s})AgBr2(s)
AgBr(aq)\text{AgBr}(\text{aq})AgBr(aq)
AgBr(s)\text{AgBr}(\text{s})AgBr(s)
Ag2Br(s)\text{Ag}_2\text{Br}(\text{s})Ag2Br(s)
Practise Edexcel GCSE Chemistry Qualitative analysis: tests for ions with exam-style questions for Foundation and Higher tier. 127 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
