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chemistry > c8: chemical analysis > Flashcards

c8: chemical analysis Flashcards

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1
Q

what is steel

A

mixture/ alloy of iron and carbon

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2
Q

what is the brown precipitate formed after mixing metal chloride with sodium hydroxide

A

iron (III)

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3
Q

why are colourings use in food

A

to improve appearance

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4
Q

what is the test for hydrogen

A
  • burning splint held at end of test tube
  • will make “squeaky pop” sound
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5
Q

what is the test for carbon dioxide

A
  • bubble the gas through limewater (aq calcium hydroxide)
  • limewater turns cloudy
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6
Q

what is the test for oxygen

A
  • insert a glowing splint into the test tube for gas
  • splint will relight
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7
Q

what is the test for chlorine

A
  • damp litmus paper into test tube of gas
  • bleach litmus paper
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8
Q

what is used to identify metal ions

A

sodium hydroxide

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9
Q

what is produced if white precipitate is formed after sodium hydroxide is added to metal ion

A

calcium, aluminium or magnesium

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10
Q

what is produced if blue precipitate is formed after sodium hydroxide is added to metal ion

A

copper II

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11
Q

what is produced if green precipitate is formed after sodium hydroxide is added to metal ion

A

iron II

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12
Q

what is produced if brown precipitate is formed after sodium hydroxide is added to metal ion

A

iron III

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13
Q

what ions produce crimson flame

A

lithium

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14
Q

what ions produce a yellow flame

A

sodium

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15
Q

what ions produce a lilac flame

A

potassium

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16
Q

what ions produce a green flame

A

copper

17
Q

what ions produce a orange-red flame

A

calcium

18
Q

what happens when carbonates are reacted with dilute acids

A

carbon dioxide produced

19
Q

how is a halide test done

A

adding dilute nitric acid, then silver nitrate

20
Q

what produces white precipitate in halide test

A

silver chloride

21
Q

what produces cream precipitate in halide test

A

silver bromide

22
Q

what produces yellow precipitate in halide test

A

silver iodide

23
Q

what is added to water for sterilisation

A

chlorine

24
Q

what would form when sodium hydroxide solution is added to aluminium ions

A

white precipitate, which then dissolves in excess sodium hydroxide

25
Q

what is an advantage of adding fluoride to water

A

better dental health

26
Q

if a white precipitate is formed after adding hcl to solution and the barium chloride, what sort of ion is the solution

A

sulfate

27
Q

what solution does the test for sulfate ions use

A

hcl and barium chloride

chemistry (8 decks)

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