Chemical / Gas Tests Flashcards
1
Q
Hydrogen
A
Lit splint on test tube causes a squeaky pop.
2
Q
Carbon Dioxide
A
Add limewater to the gas. Will turn cloudy.
3
Q
Oxygen
A
Glowing splint on test tube. Will relight.
4
Q
Chlorine
A
Put damp red litmus paper into a test tube. Will turn white.
5
Q
Ammonia
A
Turns damp red litmus paper blue.
6
Q
Iron (II)
A
(Sodium hydroxide cation) Green precipitate
7
Q
Iron (III)
A
(Sodium hydroxide cation) Red/brown precipitate
8
Q
Copper (II)
A
(Sodium hydroxide cation) Blue precipitate
9
Q
NH4+ (Ammonium)
A
(Sodium hydroxide cation) NH3 (Ammonia) + Water
10
Q
Pottasium
A
(Flame test) Lilac
11
Q
Copper
A
(Flame test) Blue-Green
12
Q
Sodium
A
(Flame test) Yellow
13
Q
Calcium
A
(Flame test) Brick-red
14
Q
Lithium
A
(Flame test) Red
15
Q
Flame test steps
A
- Put Nichrome wire in Hydrochloric acid
- Place the loop in the sample, then the flame.
- Observe the colour change.
(Make sure the wire is clean, so the colour is accurate)
