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chemistry > acids and alkalis > Flashcards

acids and alkalis Flashcards

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1
Q

what is the pH range of an acidic solution?

A

0-6

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2
Q

what is the pH range of an alkaline solution?

A

8-14

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3
Q

what is the pH of a neutral solution?

A

7

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4
Q

what solution conducts electricity?

A

acidic

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5
Q

why do acidic solutions conduct energy?

A

due to the presence of charged particles/ions

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6
Q

acids

A

H+ ion

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7
Q

what is the test for hydrogen gas?

A

burns with a pop

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8
Q

alkalis

A

OH- hydroxide ion

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9
Q

an acidid solution contains?

A

more H+ ions than OH- ions

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10
Q

a neutral solution contains?

A

an equal concentration/number of H+ and OH- ions

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11
Q

an alkaline solution contains?

A

more OH- ions than H+ ions

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12
Q

what happens when a solution is diluted?

A

concentration decreases

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13
Q

what happens when an acid is diluted?

A

the pH increases as concentration of hydrogen ions decreases

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14
Q

what happens when an alkali is diluted?

A

the pH decreases as the concentration of hydroxide ions decreases

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15
Q

how are acids made?

A

by dissolving soluble non metal oxides in water

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16
Q

how are alkalis made?

A

by dissolving soluble metal oxides and hydroxides in water

17
Q

what is neutralisation?

A

production of water through the reaction of an acid with a base

18
Q

what is another word for an alkali?

A

base

19
Q

what are the three bases?

A
  • metal oxides
  • metal hydroxides
  • metal carbonates
20
Q

how can a dry sample of salt be collected?

A

evaporation

21
Q

acid + metal hydroxide ->

A

salt + water

22
Q

acid + metal carbonate ->

A

salt + water + carbon dioxide

23
Q

acid + metal oxide ->

A

salt + water

24
Q

how are soluble salts made?

A

by neutralisation reactions

25
Q

how are insolube salts made?

A

by precipitation reaction

26
Q

what is precipitation?

A

chemical reaction where two solutions react to form an insoluble solid

27
Q

what is the insoluble solid called?

A

precipitate

28
Q

neutralisation makes?

A

soluble salts

29
Q

precipitation makes?

A

insoluble salts

30
Q

what are spectator ions?

A

present in a chemical reaction but remain unchanged on both sides

chemistry (17 decks)

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