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Chemistry (Edexcel) > Qualitative Analysis > Flashcards

Qualitative Analysis Flashcards

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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
  1. Greater sensitivity
  2. Greater accuracy
  3. 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

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 test result for ammonia gas?

A

Red –> blue litmus paper

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15
Q

How do you test for carbonate?

A

Add dilute hydrochloric acid

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16
Q

What is the positive test result for carbonate?

A

Bubbles of CO2

17
Q

How do you test for sulfate?

A

Add dilute hydrochloric acid and then barium chloride

18
Q

What is the positive test result for sulfate?

A

White precipitate of barium chloride

19
Q

How do you test for halides?

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 solution into limewater

27
Q

What is the positive test for carbon dioxide?

A

Limewater turns cloudy

28
Q

What is the positive test for chlorine?

A

Red litmus paper –> white

Chemistry (Edexcel) (6 decks)

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