A student adds acidified silver nitrate solution to three solutions containing Cl⁻, Br⁻ and I⁻ ions respectively. Which row correctly matches the ion to the colour of its precipitate?

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Question

A student adds acidified silver nitrate solution to three solutions containing Cl⁻, Br⁻ and I⁻ ions respectively. Which row correctly matches the ion to the colour of its precipitate?

Accepted Answer

C: Cl⁻ = white; Br⁻ = cream; I⁻ = yellow — Silver chloride (AgCl) is white, silver bromide (AgBr) is cream, and silver iodide (AgI) is yellow. This sequence is a key recall point on the Edexcel specification. Options A, B, and D all swap the colours between ions, reflecting common student confusion about which halide gives which colour precipitate.

Answer

C: Cl⁻ = white; Br⁻ = cream; I⁻ = yellow

Answer

D: Cl⁻ = white; Br⁻ = yellow; I⁻ = cream

Answer

A: Cl⁻ = cream; Br⁻ = white; I⁻ = yellow

Answer

B: Cl⁻ = yellow; Br⁻ = cream; I⁻ = white

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