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Chemistry > Colours > Flashcards

Colours Flashcards

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1
Q

Ag (s)

A

Silver. Learn

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2
Q

AgBr (s)

A

Cream. Result of test for bromide ions (AgNO₃ + Br⁻) is a cream precipitate, which is silver bromide

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3
Q

AgCl (s)

A

White. Result of test for chloride ions (AgNO₃ + Cl⁻) is a white precipitate, which is silver chloride

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4
Q

AgI(s)

A

Yellow. Result of test for iodide ions (AgNO₃ + I⁻) is a yellow precipitate, which is silver iodide

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5
Q

At(s)

A

Black. Black, probably, though nobody knows. The halogens get darker as we go down the group, and iodine is dark grey, so astatine is probably black.

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6
Q

Au (s)

A

Gold. Learn

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7
Q

BaSO₄ (s)

A

White. Result of test for sulfate ions (BaNO₃ + SO₄²⁻) which produces a white precipitate of barium sulfate

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8
Q

Br₂ (aq)

A

Orange. Used in test to distinguish between an alkane (no result) and an alkene (goes colourless)

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9
Q

Br₂ (l)

A

Red-brown. Bromine is one of only two elements which are liquid at room temperature. The other is mercury, which is very different from bromine.

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10
Q

C (s)

A

It depends. Carbon comes in different forms (allotropes). Diamond is a colourless solid, graphite is a grey solid, and charcoal is black

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11
Q

Ca(OH)₂ (aq)

A

Colourless. Limewater is calcium hydroxide

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12
Q

Ca²⁺ (flame test)

A

Orange/red. Learn

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13
Q

CaCO₃ (s)

A

White. Calcium carbonate. Marble/chalk/limestone. Is the white precipitate formed when carbon dioxide is bubbled through limewater

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14
Q

Cl₂ (aq)

A

Green. Learn

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15
Q

Cl₂ (g)

A

Green. Learn

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16
Q

CO (g)

A

Colourless. Learn

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17
Q

CO₂ (g)

A

Colourless. Learn

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18
Q

Cr³⁺ (aq) (Triple Science Only)

A

Green. Oxidation of alcohol to carboxylic acid, using dichromate. The dichromate is reduced to Cr³⁺

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19
Q

Cu (s)

A

Copper. Learn

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20
Q

Cu(OH)₂ (s)

A

Blue. Copper (II) hydroxide. Is the result of test for Cu²⁺ ions (NaOH + Cu²⁺). Precipitate.

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21
Q

Cu²⁺ (flame test)

A

Blue/green. Learn

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22
Q

CuCO₃ (s)

A

Green. Learn. Copper carbonate

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23
Q

CuO (s)

A

Black. Learn. Copper oxide is the black powder we can react with sulfuric acid to produce those lovely blue copper sulfate crystals

24
Q

CuSO₄ (aq)

A

Blue. Copper (II) sulfate solution. Crystallise this to make blue copper (II) sulfate crystals.

25
Q

CuSO₄ (s)

A

White. Anhydrous copper sulfate. Add this to a sample to see if the sample contains water. It it does, becomes hydrated copper sulfate (blue). This is the chemical test for presence of water.

26
Q

CuSO₄.5H₂O (s)

A

Blue. Hydrated copper (II) sulfate crystals

27
Q

Fe(OH)₂ (s)

A

Green. Iron (II) hydroxide. Is the result of test for Fe²⁺ ions (NaOH + Fe²⁺). Precipitate.

28
Q

Fe(OH)₃ (s)

A

Brown. Iron (III) hydroxide. Like rust. Is the result of test for Fe³⁺ ions (NaOH + Fe³⁺). Precipitate.

29
Q

HCl (aq)

A

Colourless. Most acids are colourless

30
Q

Hydrated iron (III) oxide

A

Brown. This is rust. Orange/brown.

31
Q

I₂ (aq)

A

Brown. Learn

32
Q

I₂ (g)

A

Purple. Learn

33
Q

I₂ (s)

A

Dark grey. Darker than the halogens above it in Periodic Table

34
Q

I₂ (s)

A

Dark grey. Darker than the halogens above it in Periodic Table

35
Q

K⁺ (flame test, or flame when K reacts with H₂O)

A

Lilac. Learn

36
Q

K₂Cr₂O₇ (aq) (Triple Science Only)

A

Orange. Potassium dichromate. Oxidation of alcohol to carboxylic acid, using dichromate. The dichromate is reduced to Cr³⁺

37
Q

Li⁺ (flame test)

A

Red. Learn

38
Q

Litmus (in acid)

A

Red. Learn

39
Q

Litmus (in alkali)

A

Blue. Learn

40
Q

Methyl orange (in acid)

A

Red. Learn

41
Q

Methyl orange (in alkali)

A

Yellow. Learn

42
Q

Methyl orange (when neutral)

A

Orange. Learn

43
Q

Mg (when burning)

A

Bright white light. Learn

44
Q

MgO (s)

A

White. White ash left behind when magnesium burns in oxygen

45
Q

Most gases (g)

A

Colourless. If you need to guess the colour of a gas, guess colourless

46
Q

Most solutions (aq)

A

Colourless. If you need to guess the colour of a solution, guess colourless

47
Q

N₂ (g)

A

Colourless. In the air around us (78%)

48
Q

Na⁺ (flame test)

A

Yellow. Learn

49
Q

O₂ (g)

A

Colourless. In the air around us (21%)

50
Q

Phenolphthalein (in acid)

A

Colourless. Learn

51
Q

Phenolphthalein (in alkali)

A

Pink. Learn

52
Q

S (s)

A

Yellow. Learn. Precipitate which forms in that kinetics experiment when acid reacts with thiosulfate

53
Q

Universal indicator (in acid)

A

Red. Learn

54
Q

Universal indicator (in alkali)

A

Purple. Learn

55
Q

F₂ (g)

A

Yellow. Fluorine is the lightest coloured of all the Halogens. Learn.

Chemistry (5 decks)

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