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chemistry > acids bases and salts > Flashcards

acids bases and salts Flashcards

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1
Q

define acid

A

an acid is a substance which produces hydrogen ions, when it is dissolved water

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2
Q

define alkali

A

an alkali is a substance which produces hydroxide ions, when it is dissolved in water

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3
Q

physical properties of acids

A

1) taste sour
2) conduct electricity in aqueous state

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4
Q

physical properties of alkalis

A

1) taste bitter
2) conduct electricity in aqueous state
3) feels soapy

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5
Q

can acid and alkalis conduct electricity?

A

acid and alkalis can conduct electricity as the ions are able to move and carry electric current

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6
Q

colour changes in universal indicator for acid

A

green to red

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7
Q

colour changes in litmus paper for acid

A

blue to red

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8
Q

colour changes for alkali in universal indicator

A

green to violet

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9
Q

colour changes for alkali in litmus paper

A

red to blue

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10
Q

acid + reactive metal (except copper, silver, gold) –> ?

A

salt + hydrogen gas (H2)

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11
Q

acid + metal carbonate —-> ?

A

salt + water + CO2

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12
Q

acid + metal oxide —-> ?

A

salt + water

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13
Q

acid + alkali —> ?

A

salt + water

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14
Q

ionic eqn for neutralisation

A

H+ (aq) + OH- (aq) —> H20 (L)

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15
Q

alkali + ammonium salt —> ?

A

salt + water + ammonia gas (NH3)

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16
Q

what is used to neutralise acidic soil?

A

calcium oxide or calcium hydroxide

17
Q

ph value and colour in universal indicator for hydrochloric, nitric and sulfuric acid

A

ph 1, red

18
Q

ph value and colour in universal indicator for ethanoic acid and CO2 in water

A

ph 3, orange

19
Q

ph value and colour in universal indicator for pure water

A

ph 7, green

20
Q

ph value and colour in universal indicator for aqueous ammonia

A

ph 12, blue

21
Q

ph value and colour in universal indicator for sodium/ potassium hydroxide

A

ph 14, purple

22
Q

test for sulfur dioxide gas

A

Bring a filter paper dipped in
acidified potassium manganate (VII)
the acidified potassium manganate
(VII) will turn from purple to
colourless

23
Q

test for chlorine gas

A

Bring a damp blue litmus near
the gas
Damp blue litmus will be bleached

24
Q

most metal oxides are?

A

basic oxides

25
Q

lead oxide, aluminium oxide and zinc oxides are what oxides?

A

amphoteric

26
Q

can amphoteric oxides react with only acid, only alkali or both?

A

amphoteric oxides can react with both acid and alkali

27
Q

can basic oxides react with only acid, only alkali or both?

A

basic oxides can only react with acid

28
Q

most non metal oxides are?

A

acidic oxides

29
Q

water, carbon monoxide and nitrogen monoxide are what kind of oxides?

A

neutral oxides

30
Q

can neutral oxides react with only acid, only alkali or both?

A

neutral oxides CANNOT react with acid or alkali

31
Q

can acidic oxides react with only acid, only alkali or both?

A

acidic oxides can only react with alkali

32
Q

are basic oxides insoluble or soluble in water?

A

most are insoluble in water. a few of them such as sodium oxide and calcium oxide can dissolve in water to form alkalis

33
Q

acidic oxides dissolves in water to form?

A

acid

34
Q

are neutral oxides soluble or insoluble in water?

A

insoluble in water

35
Q

which chlorides salts are insoluble in water?

A

lead (II) chloride and silver chloride

36
Q

which sulfate salts are insoluble in water?

A

barium sulfate, lead (II) sulfate and calcium sulfate

37
Q

which carbonate salts are soluble?

A

sodium carbonate, potassium carbonate, ammonium carbonate

38
Q

if the salt is insoluble, which method is used to prepare the salt?

A

precipitation

39
Q

if the salt is soluble, what methods are used to prepare the salt?

A

https://drive.google.com/file/d/1GoVgzn8XP5nAZdez3-U3-igBsvvkjOlC/view?usp=drivesdk

chemistry (10 decks)

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