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Chemistry > Acids > Flashcards

Acids Flashcards

1
Q

methyl orange in an acid

A

red

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2
Q

methyl orange in a neutral solution (such as distilled water)

A

yellow

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3
Q

methyl orange in an alkali

A

yellow

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4
Q

phenolphthalein in an acid

A

colourless

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5
Q

phenolphthalein in a neutral solution (such as distilled water)

A

colourless

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6
Q

phenolphthalein in an alkali

A

pink

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7
Q

red litmus paper in an acid

A

red

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8
Q

red litmus paper in a neutral solution (such as distilled water)

A

red

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9
Q

red litmus paper in an alkali

A

blue

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10
Q

blue litmus paper in an acid

A

red

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11
Q

blue litmus paper in a neutral solution (such as distilled water)

A

blue

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12
Q

blue litmus paper in an alkali

A

blue

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13
Q

universal indicator in an acid

A

red

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14
Q

universal indicator in a neutral solution (such as distilled water)

A

green

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15
Q

universal indicator in an alkali

A

blue

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16
Q

How do we measure pH?

A

using indicators or a pH meter

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17
Q

pH 0-3 are

A

strong acids

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18
Q

pH 4-6 are

A

weak acids

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19
Q

pH 7 is

A

neutral

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20
Q

pH 8-10 are

A

weak alkalis

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21
Q

pH 11-14 are

A

strong alkalis

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22
Q

What four main gases make up the air?

A

nitrogen-78%, oxygen-21%, argon-0.96%, carbon dioxide-0.04%

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23
Q

Name Method 1 of determining the percentage of oxygen in the air

A

To place an upside down measuring cylinder into water which contains some damp ron wool at the top of it

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24
Q

write a word equation for the reaction that takes place in the iron wool

A

iron + oxygen + water —> hydrated iron (III) oxide (rust)

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25
Q

Fe3+ + Cl-

A

FeCl3

26
Q

Name method 2 of determining the percentage of oxygen in the air

A

Using a gas syringe and flask containing wet iron filings

27
Q

name method 3 of determining the percentage of oxygen in the air

A

Passing air through copper with plungers

28
Q

Silver (I)

A

Ag+

29
Q

Copper (II)

A

Cu2+

30
Q

Iron (II)

A

Fe2+

31
Q

Iron (III)

A

Fe3+

32
Q

Lead (II)

A

Pb2+

33
Q

Zinc (II)

A

Zn2+

34
Q

Nitrate

A

NO3 -

35
Q

Sulfate

A

SO4 2-

36
Q

Carbonate

A

CO3 2-

37
Q

Phosphate

A

PO4 3-

38
Q

Hydroxide

A

OH-

39
Q

Ammonium

A

NH4+

40
Q

Acid

A

H+ donor

41
Q

Base

A

H+ acceptor

42
Q

Alkali

A

OH- donor

43
Q

acid + metal —>

A

salt + hydrogen

44
Q

hydrochloric acid

A

HCl

45
Q

Sulphuric acid

A

H2SO4

46
Q

Nitric acid

A

HNO3

47
Q

Phosphoric acid

A

H3PO4

48
Q

acid + base —>

A

salt + water

49
Q

acid + carbonate —>

A

salt + water + carbon dioxide

50
Q

test for carbon dioxide

A

limewater turns cloudy

51
Q

test for oxygen

A

glowing splint relights

52
Q

test for hydrogen

A

squeaky pop

53
Q

sodium hydroxide

A

NaOH

54
Q

Potassium Hydroxide

A

KOH

55
Q

Ammonium hydroxide

A

NH4OH

56
Q

soluble elements

A

sodium
potassium
ammonium
nitrate

57
Q

soluble (except with silver and lead)

A

chloride

58
Q

soluble (except with calcium, barium and lead)

A

sulfate

59
Q

insoluble (except with sodium, potassium and ammonium)

A

carbonate

oxide

60
Q

insoluble ( except with sodium, potassium and calcium)

A

hydroxide

61
Q

What kind of reaction occurs between an acid and an alkali?

A

Neutralisation

Chemistry (16 decks)

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