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Edexcel A-Level Chemistry > Chemical Tests > Flashcards

Chemical Tests Flashcards

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1
Q

What is the test for halide ions?

A

Add HNO3 and then AgNo3 to produce a precipitate

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1
Q

What colour precipitate do Chloride ions produce?

A

White

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2
Q

How does Chlorides precipitate disolve?

A

In dilute NH3

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3
Q

What colour precipitate do Bromide ions produce?

A

Cream

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4
Q

How does Bromides precipitate disolve?

A

Concentrated NH3

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5
Q

What colour precipitate do iodine ions produce?

A

Yellow

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6
Q

How does Iodines precipitate disolve?

A

Does not disolve in NH3

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7
Q

What is the test for ammonium (NH4)?

A

Add NaOH to produce NH3 (which can be tested)

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8
Q

What is the test for NH3?

A

Red litmus Paper

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9
Q

What is a positive test result for NH3?

A

Turns red litmus paper Blue

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10
Q

What is the test for carbonates (CO3^2-)?

A

Add HCl to produce CO2 (which can be tested)

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11
Q

What is the test for CO2?

A

Bubbling through Lime Water

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12
Q

What is a positive test for CO2?

A

Turns Lime Water Cloudy

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13
Q

What is the test for Sulphate ions (SO4^2-)?

A

Add BaCl2

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14
Q

What is the positive test for Sulphate Ions?

A

A white precipitate of barium sulphate (BaSO4)

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15
Q

What is the test for alcohols?

A

Add PlCl5
or Acidified Potassium Dicromate

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16
Q

What is the positive test for PlCl5 alcohol test?

A

Steamy white fumes of HCl

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17
Q

What is the positive test for alcohols using accidified potassium dichromate?

A

Orange to green colour change

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18
Q

What is the test for alkenes?

A

Bromine water

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19
Q

What is the positive test for alkenes?

A

Bromine water goes from Orange to colourless

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20
Q

Whats the test for haloalkanes?

A

Dissolve in ethanol, add water, do the halide test as normal

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21
Q

What is the test for Aldehydes and Ketones (Carbonyl Group)?

A

Bradys Reagent/2-4 DNPH

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22
Q

What is a positive result for a carbonyl group with 2-4 DNPH?

A

Orange Precipitate

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23
Q

What is the test for Aldehydes?

A

Tollen’s Reagent.
Fheling’s Solution

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24
Q

What is the positive result for Tollen’s Test?

A

Silver Mirror

25
Q

Whats the positive result for Fheling’s Reagent?

A

Red precipitate

26
Q

What is the test for Methyl Ketones?

A

Iodoform Test:
Add NaOH and I2

27
Q

What is a positive result for the iodoform test?

A

Yellow Precipitate (CHI3 iodoform (antiseptic smell))

28
Q

What is the test for Carboxylic acids?

A

PCl5

29
Q

What is the positive result for the test for Carboxylic Acids?

A

Steamy White Fumes (HCl)

30
Q

What is the test for Benzene?

A

Bromine water.
Combustion.

31
Q

What is the positive result for Benzene in Bromine Water?

A

No colour Change (Not a good test)

32
Q

What is the positive result for benzene with combustion?

A

Sooty Flame

33
Q

What is the test for esters?

A

No easy one

34
Q

What is the test for amides?

A

No easy one

35
Q

What flame test colour is Lithium?

A

Red

36
Q

What flame test colour is Sodium?

A

Yellow

37
Q

What flame test colour is Potassium?

A

Lilac

38
Q

What flame test colour is Rubidium?

A

Red/Purple

39
Q

What flame test colour is Caesium?

A

Blue/Violet

40
Q

What flame test colour is Beryllium?

A

NO COLOUR

41
Q

What flame test colour is Magnesium?

A

NO COLOUR

42
Q

What is the flame test colour for Calcium?

A

(brick) Red

43
Q

What is the flame test colour for strontium?

A

(crimson) Red

44
Q

What is the flame test colour for Barium?

A

(apple) Green

45
Q

What colour is Ti(3+) ion?

A

Purple

46
Q

What colour is Ti(2+) ion?

A

Violet

47
Q

What colour is VO2(+) ion?

A

Yellow

48
Q

What colour is VO(2+) ion?

A

Blue

49
Q

What colour is V(3+) ion?

A

Green

50
Q

What colour is V(2+) ion?

A

Violet

51
Q

What colour is Cr2O7(2-) ion?

A

Orange

52
Q

What colour is Cr(3+) ion?

A

Green

53
Q

What colour is MnO4(-) ion?

A

Purple

54
Q

What colour is MnO4(2-) ion?

A

Green

55
Q

What colour is Mn(2+) ion?

A

Pale Pink

56
Q

What colour is Fe(3+) ion?

A

Yellow

57
Q

What colour is Fe(2+) ion?

A

Pale Green

58
Q

What colour is Co(2+) ion?

A

Pink

59
Q

What colour is Ni(2+) ion?

A

Green

60
Q

What colour is Cu(2+) ion?

A

Pale Blue

Edexcel A-Level Chemistry (9 decks)

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