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Qualitative analysis: tests for ions

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Question 8

A student carried out a flame test on a sample of potassium chloride crystals using the following method:

Step 1: Dip a nichrome wire into concentrated hydrochloric acid, then hold the wire in a hot, blue Bunsen burner flame. Step 2: Dip the wire into the hydrochloric acid again, then touch the wire to the potassium chloride crystals so some adhere to it. Step 3: Hold the wire in the hot, blue Bunsen burner flame and observe the colour produced.

State the purpose of Step 1 in this procedure.

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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