Chemistry Unit 3 - The Tests!

Chemistry M3 – Tests

Tests for Cations

Flame
Tests

A test for metal ions

·       
Lithium –
burns with a crimson-red flame

·       
Sodium – burns
with a yellow-orange flame

·       
Potassium – burns
with a lilac flame

·       
Barium – burns
with a green flame

Adding
Sodium Hydroxide (NaOH)

·       
Calcium  - forms a white precipitate

·       
Copper   - forms a blue precipitate

·       
Iron(ll) - forms a sludgy green precipitate

·       
Iron (III) - forms a reddish brown precipitate

·       
Aluminium  - forms
a white at first, but then redissolves in excess NaOH to from colourless
solution

·       
Magnesium  - forms
a white precipitate

Adding
Sodium Hydroxide to an Ammonium Compound

A test for…