Chemical tests are used to identify unknown substances - Edexcel - GCSE Chemistry - Question 3 - 2023 - Paper 2
Question 3
Chemical tests are used to identify unknown substances.
(a) A flame test can be used to identify metal ions in a substance.
(i) Complete step 2 of how to carry out... show full transcript
Worked Solution & Example Answer:Chemical tests are used to identify unknown substances - Edexcel - GCSE Chemistry - Question 3 - 2023 - Paper 2
Step 1
Complete step 2 of how to carry out a flame test.
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Answer
clean the wire loop in the flame of the Bunsen burner.
Step 2
Draw one straight line from each metal ion to its flame colour in a flame test.
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Answer
metal ion: copper ion — flame colour: lilac
metal ion: potassium ion — flame colour: orange-red
metal ion: sodium ion — flame colour: yellow
metal ion: unknown — flame colour: blue-green
