Edexcel IGCSE Chemistry · Spec 2.44-2.46
Tests for Gases & Flame Tests
The chemical tests for common gases and the flame tests for metal ions.
Chemistry revision video
Tests for Gases & Flame Tests
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Spec 2.44-2.46
What you need to know
- Recall the tests for common gases
- Recall the flame test colours
- Describe how to carry out a flame test
Active recall
Quick check
Answer each question before opening the answer.
Give the tests for oxygen, carbon dioxide and hydrogen.
Oxygen relights a glowing splint; carbon dioxide turns limewater milky; hydrogen gives a squeaky pop with a lit splint.
Give the flame-test colours for lithium, sodium, potassium and copper.
Lithium — red; sodium — yellow; potassium — lilac; copper — blue-green.
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