1.1 - Flame Tests (Leaving Cert Chemistry): Flashcards
📚Flashcards
Practise the cards
13 cards from this deck
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Practise the cards
13 cards from this deck
Purpose of flame test
Purpose of flame test
Identify metal ions based on characteristic flame colors
Lithium flame color
Lithium flame color
Deep red
Sodium flame color
Sodium flame color
Yellow
Potassium flame color
Potassium flame color
Lilac
Barium flame color
Barium flame color
Yellow-green
Strontium flame color
Strontium flame color
Red
Copper flame color
Copper flame color
Blue-green
Chemical used to clean wire in flame test
Chemical used to clean wire in flame test
Concentrated hydrochloric acid
Indicator that wire is clean in flame test
Indicator that wire is clean in flame test
No colour emitted when heated
How to avoid contamination in flame test
How to avoid contamination in flame test
Use separate wires or clean thoroughly between tests
Why metals emit colored light in flame
Why metals emit colored light in flame
Electrons absorb energy and move to higher levels, then emit light when returning to lower levels
Wire materials for flame test
Wire materials for flame test
Platinum or nichrome
Wooden splint preparation for flame test
Wooden splint preparation for flame test
Soak in water overnight