A student tests solutions of three ionic substances, X, Y and Z. The student carries out the same two tests on each of the three solutions.
The table below shows the results of these tests and the student's conclusions.
| Ionic substance | Test 1 | Test 2 | Student's conclusion |
|---|---|---|---|
| X | white precipitate | blue precipitate | copper(II) sulfate |
| Y | no precipitate | white precipitate | magnesium chloride |
| Z | white precipitate | green precipitate | iron(II) sulfate |
None of the student's conclusions are fully justified.
Explain which part of each conclusion is justified and what further work can be carried out to fully justify each conclusion.
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.
