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Miss Corbett

Ion Tests for GCSE Chemistry

IonTestResult
Lithium ions Flame test (nichrome wire / concentrated HCl) Red flame
Sodium ions Flame test (nichrome wire / concentrated HCl) Yellow / Orange Flame
Potassium ions Flame test (nichrome wire / concentrated HCl) Lilac flame
Calcium ions Flame test (nichrome wire / concentrated HCl) Brick red
Barium ions Flame test (nichrome wire / concentrated HCl) Light green
Copper ions Flame test (nichrome wire / concentrated HCl) Blue / green
Aluminium ions Precipitate in sodium hydroxide solution White precipitate
Calcium ions Precipitate in sodium hydroxide solution White precipitate
Magnesium ions Precipitate in sodium hydroxide solution White precipitate
Copper ions Precipitate in sodium hydroxide solution Blue precipitate
Iron (II) ions Precipitate in sodium hydroxide solution Green precipitate
Iron (III) ions Precipitate in sodium hydroxide solution Brown (rust) precipitate
Carbonate ions Add HCl, identify gas produced Gas turns lime water cloudy (carbon dioxide)
Sulphite ions Add HCl, identify gas produced Gas turns acidified potassium dichromate (VI) orange > green
Sulphate ions Add HCl and barium chloride White precipitate
Bromide ions Add dilute nitric acid and silver nitrate Cream precipitate
Chloride ions Add dilute nitric acid and silver nitrate White precipitate
Iodide ions Add dilute nitric acid and silver nitrate Yellow precipitate
Nitrate ions Add sodium hydroxide and aluminium powder Ammonia gas produced (forms white smoke in presence of hydrogen chloride gas)
Created by: juliacorbett