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Qualitative analysis: tests for ions

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Question 14

A student carries out a flame test to identify the metal ion present in an unknown salt sample using the following method:

  • Step 1: Dip a clean copper wire loop into concentrated hydrochloric acid.
  • Step 2: Touch the wet loop to the solid salt sample so that some solid adheres to it.
  • Step 3: Hold the loop in a non-luminous, blue Bunsen burner flame.

This method will not allow the student to easily identify the metal ion.

Explain how Step 1 should be improved to enable the characteristic flame colour of the metal ion to be clearly observed.

[2]

Qualitative analysis: tests for ions Questions

  1. GCSE
  2. /Chemistry
  3. /Qualitative analysis: tests for ions

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.

Question bank