1
Q
Ammonia
A
Damp red litmus paper turns blue by holding it near test tube mouth
2
Q
Carbon dioxide
A
Turns limewater cloudy
3
Q
Chlorine
A
Damp blue litmus paper turn red then bleaches it white
4
Q
Hydrogen
A
Squeaky pop
5
Q
Oxygen
A
Glowing splint
6
Q
Lithium
A
- Heat nichrome wire until glowing
- Quench in HCl
- Pick up small sample of salt using wire
- Heat in centre of roaring flame and turns crimson red
7
Q
Sodium
A
- Heat nichrome wire until glowing
- Quench in HCl
- Pick up small sample of salt using wire
- Heat in centre of roaring flame and turns yellow
8
Q
Potassium
A
- Heat nichrome wire until glowing
- Quench in HCl
- Pick up small sample of salt using wire
- Heat in centre of roaring flame and turns lilac
9
Q
Calcium
A
- Heat nichrome wire until glowing
- Quench in HCl
- Pick up small sample of salt using wire
- Heat in centre of roaring flame and turns red/orange
10
Q
Copper flame test
A
- Heat nichrome wire until glowing
- Quench in HCl
- Pick up small sample of salt using wire
- Heat in centre of roaring flame and turns blue/green
11
Q
Iron 2+
A
- Add drops of NaOH
- Pale dark green precipitate forms
12
Q
Iron 3+
A
- Add drops of NaOH
- Orange/brown precipitate forms
13
Q
Copper hydroxide precipitate
A
- Add drops of NaOH
- Blue precipitate forms
14
Q
Chloride
A
- Add nitric acid then silver nitrate solution
- White precipitate
15
Q
Bromide
A
- Add nitric acid then silver nitrate solution
- Cream precipitate forms
16
Q
Iodide
A
- Add nitric acid then silver nitrate solution
- Yellow precipitate
17
Q
Sulfate ions
A
- Add HCl then barium chloride solution
- white precipitate
18
Q
Water
A
Anhydrous copper sulfate turns from white to blue by adding water
19
Q
Ammonium ions
A
- Add drops of NaOH to sample in test tube
- Gently warm with Bunsen burner
- Hold piece of damp red litmus paper to mouth of test tube
- If turns blue ammonium present
20
Q
Carbonate
A
- Add dilute HCl and bubble gas through limewater
- Limewater turns cloudy
Chem
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