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chemistry igcse draft > chemical tests > Flashcards

chemical tests Flashcards

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1
Q

what is the test to identify anion- carbonate co3 2-

A

dilute acid and then testing for carbon doxide
effervesnce and co2 produced

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2
Q

what is the test to identify anion- chloride CL-

A

acidify with dilute nitric acid, add aqueous silver nitrate
white percipitate

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3
Q

what is the test to identify anion- nitrate NO3 -

A

reduction with aluminium foil and aqueous sodium hydroxide and then test for ammonia gas
ammonia produced

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4
Q

what is the test to identify anion- SO4 2-

A

acidify with dilute nitric acid add aqueos barium nitrate
white percipitate

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5
Q

what is the test to identify anion- sulfite SO3 2-

A

add small volume, acidified aqueous potassium manganate
goes from purple to colourless

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6
Q

what is the test to identify anion- BROMIDE Br -

A

acidify with dilute nitric acid and then add aqueos silver nitrate
turns cream percipitate

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7
Q

what is the test to identify anion- iodide
I -

A

acidify with dilute nitric acid and then add aquoes silver nitrate
yellow percipitate

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8
Q

what happens with aluminium with reaction with
aqueous sodium hydroxide
aquoes ammonia

A

white ppt. soluble in excess, giving colourless solution
white ppt, insoluble in excess

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9
Q

what happens with ammonium with reaction with
aqueous sodium hydroxide
aquoes ammonia

A

ammonia produced on warming
nothing

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10
Q

what happens with calcium with reaction with
aqueous sodium hydroxide
aquoes ammonia

A

white ppt, insoluble in excess
no ppt, or very slight white ppt

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11
Q

what happens with chromium with reaction with
aqueous sodium hydroxide
aquoes ammonia

A

green ppt, soluble in excess
green ppt, insoluble in excess

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12
Q

what happens with copper with reaction with
aqueous sodium hydroxide
aquoes ammonia

A

light blue ppt, isnoluble in excess
light blue ppt, soluble in ecess, giving a dark blue solution

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13
Q

what happens with iron 2+ with reaction with
aqueous sodium hydroxide
aquoes ammonia

A

green ppt, insoluble in excess ppt turns brown near surfce on standing
green ppt, insoluble in excess ppt turns brown near surface on standing

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14
Q

what happens with iron 3+ with reaction with
aqueous sodium hydroxide
aquoes ammonia

A

red-brown ppt, insoluble in excess
red-brown ppt insoluble in excess

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15
Q

what happens with zinc with reaction with
aqueous sodium hydroxide
aquoes ammonia

A

white ppt, soluble in excess giving colourless solution
white ppt, soluble in excess giving a colourless solution

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16
Q

describe colour of flame tests for metal ions:
lithium

A

red

17
Q

describe colour of flame tests for metal ions:
sodium

A

yellow

18
Q

describe colour of flame tests for metal ions:
potassium

A

lilac

19
Q

describe colour of flame tests for metal ions:
calcium

A

orange-red

19
Q

describe colour of flame tests for metal ions:
barium

A

light green

20
Q

describe colour of flame tests for metal ions:
copper

A

blue-green

20
Q

describe test to identify gas: carbon dioxide

A

turns limewater milky

20
Q

describe test to identify gas: ammonia

A

turns damp red litmus paper blue

21
Q

describe test to identify gas: chlorine

A

bleaches damp litmus paper

21
Q

describe test to identify gas: hydrogen

A

pops with a lightned splint

22
Q

describe test to identify gas: oxygen

A

relights a glowing splint

23
Q

describe test to identify gas: sulfur dioxide

A

turns acidified aquoes potassium mangante from purple to colourless

chemistry igcse draft (16 decks)

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