An analytical chemist is investigating a white powder retrieved from a historic building's woodwork, suspected to be a copper-based preservative. To test for the presence of the metal cation, they carry out a flame test using the following procedure:
The chemist is unable to observe any characteristic coloration from the sample.
Describe the adjustment that must be made to the Bunsen burner's air hole, and explain why this change is critical for identifying the characteristic flame colour of the metal ion.
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.
