A laboratory technician is verifying the contents of a mislabelled reagent bottle suspected of containing potassium iodide solution.
Describe a chemical test that the technician could perform to confirm the presence of iodide ions (I−I^-I−) in the solution, including the reagents used and the expected observation.
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.
