An environmental consultant retrieves a solid crystalline crust forming near the drainage of an electroplating workshop. The solid is suspected to be a mixture of ammonium chloride, NH4Cl\text{NH}_4\text{Cl}NH4Cl, and iron(III) chloride, FeCl3\text{FeCl}_3FeCl3.
The consultant is provided with:
Describe the chemical tests the consultant should perform to confirm the presence of all three ions (Fe3+\text{Fe}^{3+}Fe3+, NH4+\text{NH}_4^+NH4+, and Cl−\text{Cl}^-Cl−) in the sample. Your description must include the experimental procedures, the expected observations, and the ionic equations (including state symbols) for each positive test.
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.
