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Chemistry > Testing > Flashcards

Testing Flashcards

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1
Q

Test for lithium

A
  • clean platinum wire loop, dipped in HCL and held in a flame until no colour
  • dip in sample, put in flame and see colour

CRIMSON

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2
Q

Test for Fe2+

A
  • add sodium hydroxide, a colour precipitate is obtained

GREEN

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3
Q

Test for chloride

A
  • add nitric acid followed by silver nitrate solution

WHITE

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4
Q

Test for ammonium ions

A

Add sodium hydroxide is, if ammonia is given off ammonium ions are present

RED LITMUS-> BLUE

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5
Q

Test for sodium

A
  • clean platinum wire loop, dipped in HCL and held in a flame until no colour
  • dip in sample, put in flame and see colour

ORANGE

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6
Q

Test for Cu2+

A
  • add sodium hydroxide, a colour precipitate is obtained

BLUE

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7
Q

Test for potassium

A
  • clean platinum wire loop, dipped in HCL and held in a flame until no colour
  • dip in sample, put in flame and see colour

LILAC

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8
Q

Test for sulphate

A
  • Add dilute HCL + barium chloride

- White precipitative is formed

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9
Q

Test for calcium

A
  • clean platinum wire loop, dipped in HCL and held in a flame until no colour
  • dip in sample, put in flame and see colour

BRICK RED

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10
Q

Test for Fe3+

A
  • add sodium hydroxide, a colour precipitate is obtained

BROWN

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11
Q

Test for Bromide

A
  • add nitric acid followed by silver nitrate solution

CREAM

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12
Q

Test for carbonate

A
  • add dilute HCL

- if CO2 is given off, carbonate is present

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13
Q

Test for iodide

A
  • add nitric acid followed by silver nitrate solution

YELLOW

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14
Q

Test for chlorine gas

A

Bleaches damp litmus paper white

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15
Q

Test for oxygen

A

Relights glowing splint

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16
Q

Test for CO2

A

Turns limewater cloudy

17
Q

Test for hydrogen

A

Add lighted splint, squeaky pop is heard

18
Q

Test for Ammonia

A

Turns red litmus blue

19
Q

Test for water

A

• Add anhydrous copper (II) sulfate to water and it should turn from white to blue

Physical/purity test
• pure water will always: boil at 100 c, freeze at 0 c

20
Q

Testing for carbon-carbon double bonds (alkenes)

A
  • add bromine water
  • alkenes eg but-1-ene would go from Orange to colourless
  • alkanes would have no colour change unless UV light is present

Chemistry (14 decks)

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