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Tests for ions and gases Flashcards

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
what would the result be for chloride
white precipitate
26
what would the result be for bromide
cream precipitate
27
what would the result be for iodide
yellow precipitate
28
how to test for nitrate
add aluminium foil and sodium hydroxide solution and heat
29
what would the result be for nitrate
ammonia gas given off
30
how to test for sulfate
add hydrochloric acid then barium nitrate solution
31
what would the result be for nitrate
white precipitate
32
how to test for sulfite
add hydrochloric acid and warm gently
33
what would the result be for sulfite
sulfur dioxide produced
34
how to test for carbonate
add hydrochloric acid
35
what would the result be for carbonate
bubble seen, lime water turns milky
36
how to test for oxygen
put a glowing splint to the test tube
37
what would the result be for oxygen
splint relights
38
how to test for hydrogen
put a lighted splint to the test tube
39
what would the result be for hydrogen
goes 'pop'
40
how to test for carbon dioxide
bubble through lime water (aqueous calcium hydroxide)
41
how to test for ammonia
hold damp red litmus at mouth of the test tube
42
what would the result be for carbon dioxide
turns milky (cloudy)
43
what would the result be for ammonia
litmus paper turns blue and has a pungent smell
44
how to test for chlorine
hold damp blue litmus at mouth of test tube
45
what would the result for chlorine
turns damp litmus red then white
46
how to test for sulfur dioxide
add acidified potassium permanganate
47
what would the result be for sulfur dioxide
turns from purple to colourless
48
what colour are group 1 metals
white solids and dissolve in water to form colourless solutions
49
what colur is chlorine
pale green-yellow
50
what colour is bromine
red-brown
51
what colour is iodine
grey-black and sublimes into purple vapour
52
what colour is fluorine
pale yellow
53
what colour are noble gases
colourless

Chemistry (7 decks)

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