Some metal ions can be detected using a flame test - Edexcel - GCSE Chemistry - Question 2 - 2017 - Paper 1
Question 2
Some metal ions can be detected using a flame test.
A flame test involves the following steps.
These steps are not in the correct order.
1 hold the flame test wire... show full transcript
Worked Solution & Example Answer:Some metal ions can be detected using a flame test - Edexcel - GCSE Chemistry - Question 2 - 2017 - Paper 1
Step 1
What is the correct order of steps for a flame test?
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Answer
The correct order of steps for a flame test is 2 – 1 – 3. This means:
Dip the flame test wire into the substance.
Hold the flame test wire in a Bunsen flame.
Clean the flame test wire.
Step 2
Draw one straight line from each test to the ion it shows to be present.
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Answer
The test with dilute hydrochloric acid followed by barium chloride solution shows the presence of the carbonate ion, CO₃²⁻.
The test with dilute nitric acid followed by silver nitrate solution shows the presence of the chloride ion, Cl⁻.
