Reactions of Metal-Aqua Ions (AQA A-Level Chemistry): Flashcards

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Reactions of Metal-Aqua Ions
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Colour of Fe2+Fe²⁺ aqueous ion

Pale green

Colour of Cu2+Cu²⁺ aqueous ion

Pale blue

Colour of Al3+Al³⁺ aqueous ion

Colourless

Colour of Fe3+Fe³⁺ aqueous ion

Pale orange

Fe2+Fe²⁺ with OHOH⁻ or NH3NH₃ precipitate

Dark green, turns orange-brown over time

Cu2+Cu²⁺ with excess NH3NH₃ forms

Dark blue solution

Al3+Al³⁺ white ppt with excess OHOH⁻

Redissolves to give colourless solution

Fe3+Fe³⁺ precipitate colour with bases

Red-brown precipitate

Fe3+Fe³⁺ with CO32CO₃²⁻ additional observation

Effervescence (due to CO2CO₂ release)

Cu2+Cu²⁺ with OHOH⁻ precipitate colour

Light blue precipitate

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