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Chemistry > Tests for ions and gases > Flashcards

Tests for ions and gases Flashcards

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1
Q

effect of adding aqueous sodium hydroxide to ammonium

A

when heated, ammonia gas given off- turns litmus blue

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2
Q

effect of adding aqueous sodium hydroxide copper

A

Pale blue precipitate forms and precipitate does not dissolve in excess

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3
Q

effect of adding aqueous sodium hydroxide to iron (II)

A

Pale green precipitate forms and precipitate does not dissolve in excess

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4
Q

effect of adding aqueous sodium hydroxide to iron (III)

A

Red-brown precipitate forms and precipitate does not dissolve in excess

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5
Q

effect of adding aqueous sodium hydroxide to aluminium

A

white precipitate forms and precipitate does dissolve in excess sodium hydroxide

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6
Q

effect of adding aqueous sodium hydroxide to zinc

A

white precipitate forms and precipitate does dissolve in excess

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7
Q

effect of adding aqueous sodium hydroxide to calcium

A

white precipitate forms and precipitate does not dissolve in excess

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8
Q

effect of adding aqueous sodium hydroxide to chromium

A

green precipitate and precipitate does dissolve in excess

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9
Q

effect of adding aqueous ammonia to copper

A

pale blue precipitate forms and adding excess the ppt dissolves- deep blue solution

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10
Q

effect of adding aqueous ammonia to iron (II)

A

pale green precipitate forms and ppt does not dissolve in excess

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11
Q

effect of adding aqueous ammonia to iron (III)

A

Red-brown precipitate forms and precipitate does not dissolve in excess

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12
Q

effect of adding aqueous ammonia to aluminium

A

white precipitate forms and precipitate does not dissolve in excess

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13
Q

effect of adding aqueous ammonia to zinc

A

white precipitate forms and precipitate does dissolve in excess

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14
Q

effect of adding aqueous ammonia to calcium

A

no precipitate forms (or slight)

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15
Q

effect of adding aqueous ammonia to chromium (III)

A

grey green precipitate and insoluble in excess

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16
Q

what are the tests for the metal ions

A

the flame test

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17
Q

flame test of lithium

A

red

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18
Q

sodium

A

yellow

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19
Q

potassium

A

lilac

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20
Q

copper

A

blue-green

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21
Q

calcium

A

orange- red

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22
Q

barium

A

light green

23
Q

which are the 3 halides

A

chloride, bromide and iodide

24
Q

how do you test for the halides

A

add nitric acid then silver nitrate solution

25
Q

what would the result be for chloride

A

white precipitate

26
Q

what would the result be for bromide

A

cream precipitate

27
Q

what would the result be for iodide

A

yellow precipitate

28
Q

how to test for nitrate

A

add aluminium foil and sodium hydroxide solution and heat

29
Q

what would the result be for nitrate

A

ammonia gas given off

30
Q

how to test for sulfate

A

add hydrochloric acid then barium nitrate solution

31
Q

what would the result be for nitrate

A

white precipitate

32
Q

how to test for sulfite

A

add hydrochloric acid and warm gently

33
Q

what would the result be for sulfite

A

sulfur dioxide produced

34
Q

how to test for carbonate

A

add hydrochloric acid

35
Q

what would the result be for carbonate

A

bubble seen, lime water turns milky

36
Q

how to test for oxygen

A

put a glowing splint to the test tube

37
Q

what would the result be for oxygen

A

splint relights

38
Q

how to test for hydrogen

A

put a lighted splint to the test tube

39
Q

what would the result be for hydrogen

A

goes ‘pop’

40
Q

how to test for carbon dioxide

A

bubble through lime water (aqueous calcium hydroxide)

41
Q

how to test for ammonia

A

hold damp red litmus at mouth of the test tube

42
Q

what would the result be for carbon dioxide

A

turns milky (cloudy)

43
Q

what would the result be for ammonia

A

litmus paper turns blue and has a pungent smell

44
Q

how to test for chlorine

A

hold damp blue litmus at mouth of test tube

45
Q

what would the result for chlorine

A

turns damp litmus red then white

46
Q

how to test for sulfur dioxide

A

add acidified potassium permanganate

47
Q

what would the result be for sulfur dioxide

A

turns from purple to colourless

48
Q

what colour are group 1 metals

A

white solids and dissolve in water to form colourless solutions

49
Q

what colur is chlorine

A

pale green-yellow

50
Q

what colour is bromine

A

red-brown

51
Q

what colour is iodine

A

grey-black and sublimes into purple vapour

52
Q

what colour is fluorine

A

pale yellow

53
Q

what colour are noble gases

A

colourless

Chemistry (7 decks)

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