Topic 4.1.5 - Flame tests Flashcards
1
Q
sodium
A
Orange
2
Q
Lithium
A
Red
3
Q
Potassium
A
Lilac
4
Q
Rubidium
A
Red/Purple
5
Q
Caesium
A
Blue/Violet
6
Q
Beryllium
A
No colour
Doesn’t emit visible light
7
Q
Magnesium
A
No colour
8
Q
Calcium
A
Brick Red
9
Q
Stronium
A
Crimson Red
10
Q
Barium
A
Apple green
11
Q
How to conduct a flame test?
A
Clean nichrome or platinum loop in concentrated HCl
Place solid on the wire loop
Place wire in a roaring blue flame from a Bunsen burner and record colour observed
12
Q
How to test for ammonium ions?
A
Add sodium hydroxide solution and warm.
Releases ammonia gas
Ammonia turns damp red litmus paper blue.
13
Q
Why is the flame test wire dipped in concentrated hydrochloric acid?
A
Reacts with the compounds to form volatile chlorides
