Required Practical 6 - Organic Tests (AQA A-Level Chemistry): Flashcards

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Required Practical 6 - Organic Tests
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Reagent for metal test of alcohols

Metallic sodium

Observation: sodium + alcohol

H2H_2 gas (squeaky pop with lit splint)

Acidified dichromate colour change: 1°/2° alcohols

Orange to green

Acidified dichromate result: tertiary alcohols

Remains orange (no change)

Reagent for testing aldehydes

Fehling's solution (A and B mixed)

Positive aldehyde test observation

Brick-red precipitate

Reagent for testing alkenes

Bromine water

Positive alkene test observation

Decolourises from orange to colourless

Halogenoalkane test: white ppt ion identity

Cl−Cl^- (chloride ions)

Halogenoalkane test: cream ppt ion identity

Br−Br^- (bromide ions)

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