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Tests are carried out to identify the ions in two solids, P and Q - Edexcel - GCSE Chemistry - Question 4 - 2020 - Paper 1

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Tests are carried out to identify the ions in two solids, P and Q. (a) A flame test is used to identify the metal ions in each of these solids. (i) Describe how to... show full transcript

Worked Solution & Example Answer:Tests are carried out to identify the ions in two solids, P and Q - Edexcel - GCSE Chemistry - Question 4 - 2020 - Paper 1

Step 1

Describe how to do a flame test.

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Answer

To conduct a flame test, first take a clean wire loop (usually made of platinum or nichrome) and dip it into the solid substance being tested. Next, hold the wire in the flame of a Bunsen burner, observing the color produced. It is important to hold the wire in the Bunsen flame to ensure accurate results.

Step 2

Draw one straight line from each metal ion to its flame colour.

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Answer

  1. Calcium → Yellow
  2. Potassium → Lilac
  3. Sodium → Orange-red
  4. Copper → Blue-green

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