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Chemistry > Qualitative analysis > Flashcards

Qualitative analysis Flashcards

1
Q

What colour flame does sodium produce?

A

Yellow

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2
Q

What colour flame does lithium produce?

A

Red

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3
Q

What colour flame does potassium produce?

A

Lilac

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4
Q

What colour flame does calcium produce?

A

Orange-red

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5
Q

What colour flame does copper produce?

A

Blue-green

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6
Q

What are the advantages of flame photometry?

A
  • Greater sensitivity
  • Greater accuracy
  • Faster speeds
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7
Q

What is the precipitate colour of aluminium?

A

White —> Colourless

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8
Q

What is the precipitate colour of calcium?

A

White

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9
Q

What is the precipitate colour of copper?

A

Blue

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10
Q

What is the precipitate colour of iron(II)?

A

Dark green

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11
Q

What is the precipitate colour of iron(III)?

A

Brown

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12
Q

What solution do you add to find a metal cation?

A

Sodium hydroxide

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13
Q

How do you test for ammonia gas?

A

Add sodium hydroxide and gently heat

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14
Q

What is the positive result for ammonium ions?

A

Ammonia gas is created and damp red litmus paper turns blue

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15
Q

How do you test for carbonate anions?

A

Add dilute hydrochloric acid

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16
Q

What is the positive test result for carbonate anions?

A

Bubbles of CO2

17
Q

How do you test for sulfate anions?

A

Add dilute hydrochloric acid and then barium chloride

18
Q

What is the positive test result for sulfate anions?

A

White precipitate of barium chloride

19
Q

How do you test for halide anions?

A

Add dilute nitric acid and silver nitrate

20
Q

What is the positive test result for chloride?

A

White precipitate

21
Q

What is the positive test result for bromide?

A

Cream precipitate

22
Q

What is the positive test result for iodine?

A

Yellow precipitate

23
Q

How do you test for water?

A

Add anhydrous copper(II) sulfate or cobalt chloride paper

24
Q

What is the positive test result for water? (Anhydrous copper(II) sulfate)

A

White —> blue

25
Q

What is the positive test result for water? (cobalt chloride paper)

A

Blue —> pink

26
Q

How do you test for carbon dioxide?

A

Bubble through limewater

27
Q

What is the positive test result for carbon dioxide?

A

Limewater turns cloudy

28
Q

How do you test for oxygen?

A

Glowing splint

29
Q

What is the positive test result for oxygen?

A

Glowing splint relights

30
Q

How do you test for ammonia gas?

A

Damp red litmus paper

31
Q

What is the positive test result for ammonia gas?

A

Damp red litmus paper turns blue

32
Q

How do you test for chlorine gas?

A

Damp blue litmus paper

33
Q

What is the positive test result for chlorine gas?

A

Damp blue litmus paper turns red then is bleached white

Chemistry (3 decks)

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