11. Qualitative Chemistry (Tests for ions)
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What is the positive test for hydrogen?
Lit splint + squeaky pop
What is the positive test for oxygen?
Relights a glowing splint
What is the positive test for carbon dioxide?
Turns limewater cloudy
What is the positive test for carbonate ions?
Add hydrochloric acid and bubble the evolved gas through limewater which goes cloudy
What is the positive test for sulfate ions?
Barium chloride forms a white precipitate
What is the positive test for chloride ions?
Silver nitrate forms a white precipitate
What is the positive test for iodide ions?
Silver nitrate forms a yellow precipitate
What is the positive test for bromide ions?
Silver nitrate forms a cream precipitate
What is the positive test for iron(II) ions?
Sodium hydroxide forms a black/green precipitate
What is the positive test for iron(III) ions?
Sodium hydroxide forms a orange/brown precipitate
What is the positive test for copper(II) ions?
Sodium hydroxide forms a blue precipitate
What is the positive test for magnesium ions?
Sodium hydroxide forms a white precipitate
What is the positive test for aluminium ions?
Sodium hydroxide forms a white precipitate which quickly dissolves
What is the positive test for calcium ions?
Sodium hydroxide forms a white precipitate + flame test produces orange flame
What is the positive test for lithium ions?
flame test produces red/crimson flame
What is the positive test for potassium ions?
flame test produces lilac flame
What is the positive test for sodium ions?
flame test produces orange flame