Tests for anions (Edexcel GCSE Chemistry): Flashcards

Negatively charged ions

Atom gains one or more electrons

$HCl$ and limewater

Limewater turns cloudy/milky

$CaCO₃$ (calcium carbonate)

$HCl$ and barium chloride ($BaCl₂$)

White precipitate of $BaSO₄$

Barium sulphate ($BaSO₄$)

$HNO₃$ and silver nitrate ($AgNO₃$)

White precipitate of $AgCl$

Cream precipitate of $AgBr$

Yellow precipitate of $AgI$

White, cream, yellow

$SO₄²⁻ (aq) + Ba²⁺ (aq) → BaSO₄ (s)$

$Cl⁻ (aq) + Ag⁺ (aq) → AgCl (s)$