A student tested an unknown solution for chloride ions by:
A white precipitate was formed.
The student cannot conclude from this result that the unknown solution contains chloride ions.
Explain what the student should change to obtain a valid result.
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.
