Positive ions - Flame Tests (Edexcel GCSE Chemistry Combined Science): Flashcards

📚Flashcards
8.3.1 Flame Tests
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Purpose of flame tests

Identify metal ions based on flame colour

Flame colour of Li+Li^+

Crimson

Flame colour of Na+Na^+

Yellow

Flame colour of K+K^+

Lilac

Flame colour of Ca2+Ca^{2+}

Orange/red

Flame colour of Cu2+Cu^{2+}

Green

What happens to electrons when metal ions are heated in a flame

Jump to higher energy levels

What do excited electrons release when returning to original level

Energy as light

Why each metal ion produces different flame colour

Each releases light of a unique wavelength

Practical application of flame tests

Pyrotechnics/fireworks

Metal ion producing crimson flame

Li+Li^+

Metal ion producing lilac flame

K+K^+

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