Last updated on Sep 21, 2026

Organic & Inorganic Chemistry Practicals (AQA A-Level Chemistry): Flashcards

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Required Practical 4 - Identifying Anions & Cations

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Cations

Positively charged ions

Anions

Negatively charged ions

$NH₄⁺$ + NaOH + heat: red litmus

Turns blue (ammonia gas)

$CO₃²⁻$ + HCl: limewater effect

Turns cloudy

$SO₄²⁻$ test reagent giving white ppt

$BaCl₂$ (barium chloride)

$Cl⁻$ + $AgNO₃$ ppt colour

White

$Br⁻$ + $AgNO₃$ ppt colour

Cream

$I⁻$ + $AgNO₃$ ppt colour

Yellow

Halide dissolving in dilute $NH₃$

Chloride ( $Cl⁻$ )

$OH⁻$ : red litmus result

Turns blue

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Organic & Inorganic Chemistry Practicals

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