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38 terms

Preparing and Analysing

All the chemical tests for the Edexcel IGCSE Chemistry syllabus.
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H₂O
Turns anhydrous copper sulfate from white to blue
H₂
Burns with a squeaky pop
O₂
Relights a glowing splint
CO₂
Bubble through limewater which turns milky
NH₃
Turns damp red litmus paper blue
Cl₂
Turns damp blue litmus paper red
Li⁺
Flame test: crimson
Na⁺
Flame test: golden yellow
K⁺
Flame test: lilac
Ca ²⁺
Flame test: brick red
NH₄⁺
Warm with sodium hydroxide solution and test gas damp red litmus for ammonia
Cu²⁺
Forms a pale blue precipitate with sodium hydroxide
Fe³⁺
Forms a brown precipitate with sodium hydroxide
Fe²⁺
Forms a green precipitate with sodium hydroxide
Cl⁻
Forms a white precipitate with dilute nitric acid and silver nitrate
Br⁻
Forms a cream precipitate with dilute nitric acid and silver nitrate
I⁻
Forms a yellow precipitate withdilute nitric acid and silver nitrate
SO₄²⁻
Forms a white precipitate with dilute hydrochloric acid and barium chloride
CO₃²⁻
Add dilute hydrochloric acid and bubble the gas produced through limewater
water
Turns anhydrous copper sulfate from white to blue
hydrogen
Burns with a squeaky pop
oxygen
Relights a glowing splint
carbon dioxide
Bubble through limewater which turns milky
ammonia
Turns damp red litmus paper blue
chlorine
Turns damp blue litmus paper red
lithium ion
Flame test: crimson
sodium ion
Flame test: golden yellow
potassium ion
Flame test: lilac
calcium ion
Flame test: brick red
ammonium ion
Warm with sodium hydroxide solution and test gas damp red litmus for ammonia
copper ion
Forms a pale blue precipitate with sodium hydroxide
iron III ion
Forms a brown precipitate with sodium hydroxide
iron II ion
Forms a green precipitate with sodium hydroxide
choride ion
Forms a white precipitate with dilute nitric acid and silver nitrate
bromide ion
Forms a cream precipitate with dilute nitric acid and silver nitrate
iodide ion
Forms a yellow precipitate withdilute nitric acid and silver nitrate
sulfate ion
Forms a white precipitate with dilute hydrochloric acid and barium chloride
carbonate ion
Add dilute hydrochloric acid and bubble the gas produced through limewater