Ion Tests Flashcards
1
Q
Lithium flame test
A
Crimson flame
2
Q
Sodium flame test
A
Yellow flame
3
Q
Potassium flame
A
Lilac flame
4
Q
Calcium flame
A
Orange-red flame
5
Q
Copper flame
A
Green flame
6
Q
Doing a flame test
A
- Clean platinum wire loop by dipping it in HCl until no colour
- dip in sample
7
Q
Calcium precipitate
A
White
8
Q
Copper precipitate
A
Blue
9
Q
Iron II prevcipitate
A
Green
10
Q
Iron III precipitate
A
Brown
11
Q
Aluminium
A
White then dissolves in excess NaOH to form colourless
12
Q
Magnesium precipitate
A
White
13
Q
Test for carbonates
A
Add a dilute acid
Pass through limewater
If cloudy then co2 present therefore carbonates
14
Q
Test for sulfates
A
Add HCl to sample
Add barium chloride
If sulfates, white precipitate of barium sulfate
15
Q
Test for halides
A
Add dilute HCl
add silver nitrate
