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3. (a) A flame test is used to identify some metal ions in salts - Edexcel - GCSE Chemistry - Question 3 - 2014 - Paper 1

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3. (a) A flame test is used to identify some metal ions in salts. A flame test was carried out on a salt. The flame colour was orange-red. Complete the sentence by ... show full transcript

Worked Solution & Example Answer:3. (a) A flame test is used to identify some metal ions in salts - Edexcel - GCSE Chemistry - Question 3 - 2014 - Paper 1

Step 1

Complete the sentence

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Answer

The metal ion in the salt was D. calcium. The orange-red flame indicates the presence of calcium ions.

Step 2

Draw lines to the colour of the precipitate

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Answer

The correct pairs are:

  • Aluminium ions, Al³⁺ → blue
  • Copper ions, Cu²⁺ → green
  • Iron(III) ions, Fe³⁺ → red-brown

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