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Chemistry chemical tests
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Created by
Amelie Westley
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Cards (37)
What sound does hydrogen make when tested?
'Squeaky pop'
sound
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How is hydrogen tested in a laboratory?
Using a
burning
splint in the
gas
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What happens to a glowing splint in oxygen?
It
relights
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How is oxygen tested in a laboratory?
By inserting a
glowing
splint into the
gas
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What indicates the presence of carbon dioxide in limewater?
It turns cloudy
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How is carbon dioxide tested in a laboratory?
By bubbling the gas through
limewater
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What color does damp red litmus paper turn in ammonia?
Blue
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How is ammonia tested in a laboratory?
Using damp red
litmus paper
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What forms when ammonia reacts with hydrogen chloride gas?
White smoke of
ammonium chloride
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How is chlorine tested in a laboratory?
By using damp
litmus paper
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What happens to damp litmus paper in chlorine gas?
It
bleaches
and turns white
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What color flame does lithium produce in a flame test?
Red
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What color flame does sodium produce in a flame test?
Yellow
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What color flame does potassium produce in a flame test?
Lilac
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What color flame does calcium produce in a flame test?
Orange-red
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What color flame does copper produce in a flame test?
Blue-green
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How is ammonium ion (NH4+) tested using NaOH(aq)?
It forms
NH3
(g) and turns
litmus
blue
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What precipitate does copper(II) produce with NaOH(aq)?
Blue
precipitate
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What precipitate does iron(II) produce with NaOH(aq)?
Green
precipitate
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What precipitate does iron(III) produce with NaOH(aq)?
Brown
precipitate
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How are halide ions tested using silver nitrate solution?
Add
nitric acid
, then silver nitrate
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What precipitate does chloride give with nitric acid and silver nitrate?
White precipitate
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What precipitate does bromide give with nitric acid and silver nitrate?
Cream precipitate
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What precipitate does iodide give with nitric acid and silver nitrate?
Yellow precipitate
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How are sulfate ions tested using barium chloride solution?
Add
hydrochloric acid
, then barium chloride
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What indicates the presence of sulfate ions?
Add dilute hydrochloric acid and barium chloride and a White precipitate will form
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How do carbonate ions react with dilute acids?
They produce
carbon dioxide
gas
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How is carbon dioxide identified when carbonate ions react with dilute acids?
By bubbling through
limewater
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What happens to limewater when carbon dioxide is present?
It goes
cloudy
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How is the presence of water tested using anhydrous copper(II) sulfate?
It turns
blue
when water is present
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What color is anhydrous copper(II) sulfate?
White
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How can the purity of water be tested?
By evaporating it or measuring boiling point
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What are the tests for gases and their results?
Hydrogen
: 'Squeaky pop' sound
Oxygen
: Glowing splint relights
Carbon dioxide
: Limewater turns cloudy
Ammonia: Damp red litmus turns blue
Chlorine: Damp litmus bleaches white
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What are the flame test colors for cations?
Lithium:
Red
Sodium:
Yellow
Potassium:
Lilac
Calcium:
Orange-red
Copper:
Blue-green
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What are the tests for anions and their results?
Chloride: White precipitate with
silver nitrate
Bromide
: Cream precipitate with silver nitrate
Iodide
: Yellow precipitate with silver nitrate
Sulfate
: White precipitate with
barium chloride
Carbonate
: Produces
CO₂
with dilute acids
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What
are the tests for cations and their results?
Ammonium:
Turns
damp red litmus blue
Copper(II):
Blue
precipitate with
NaOH
Iron(II):
Green
precipitate with NaOH
Iron(III):
Brown
precipitate with NaOH
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How can the presence of water be tested?
Using
anhydrous
copper(II) sulfate
: turns
blue
Evaporating
water
or measuring
boiling point
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