Chemical tests: Cations (Positive Ions) Flashcards
1
Q
What coloured flame does Lithium burn with?
A
Crimson (Red) flame
2
Q
What coloured flame does Sodium burn with?
A
Yellow flame
3
Q
What coloured flame does Potassium burn with?
A
Lilac flame
4
Q
What coloured flame does Calcium burn with?
A
Brick-red (Orange-red)
5
Q
What coloured flame does Copper (II) burn with?
A
Blue-green flame
6
Q
What colour precipitate does Copper (II) form with Sodium Hydroxide
A
Blue
7
Q
What colour precipitate does Iron (II) form with Sodium Hydroxide
A
Green
8
Q
What colour precipitate does Copper (III) form with Sodium Hydroxide
A
Brown
9
Q
What is the test for Ammonium (NH4+)
A
Produces ammonia (NH3) gas which turns damp red litmus blue
