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chemistry igcse 0620 > acids and bases > Flashcards

acids and bases Flashcards

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1
Q

define acids

A

proton donors to form H+

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2
Q

define bases

A

proton acceptors to form OH-

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3
Q

state the difference between weak and strong acids

A

weak acids oxidises completely in water to release the most protons

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4
Q

what is the colour shown when methyl orange is added to an acid

A

red

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5
Q

what is the colour shown when litmus paper is added to an acid

A

red

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6
Q

what forms when an acid reacts with a base

A

salt + water

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7
Q

acid + metal ->

A

salt + hydrogen

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8
Q

acid + metal carbonate ->

A

salt + carbon dioxide + water

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9
Q

define alkali

A

bases soluble in water

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10
Q

what is the colour shown when methyl orange is added to a base

A

yellow

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11
Q

what is the colour shown when litmus paper is added to a base

A

blue

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12
Q

what is the colour shown when phenolphthalein is added to a base

A

pink

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13
Q

what is the colour shown when phenolphthalein is added to an acid

A

colourless

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14
Q

what is the colour shown when phenolphthalein is added to a neutral solution

A

colourless

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15
Q

list 7 bases

A
  1. metal hydroxides
  2. metal carbonates
  3. most of metal oxides
  4. ammonia
  5. ammonium hydroxide
  6. ammonium carbonate
  7. metal hydrogen carbonate
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16
Q

list 3 substances to be added to acidic soil to neutralise it

A
  1. limestone - calcium carbonate
  2. lime - calcium oxide
  3. calcium hydroxide
17
Q

how are acidic oxides formed

A

non-metals reacts with oxygen

18
Q

what do acidic oxides react with

A

bases

19
Q

how are basic oxides formed

A

metals reacting with oxygen

20
Q

what are neutral oxides

A

they dont react with either acids nor bases

21
Q

what do basic oxides react with

A

acids

22
Q

list 3 examples of neutral oxides

A
  1. h2o
  2. no
  3. co
23
Q

what are amphoteric oxides

A

oxides reacting with both acids and bases

24
Q

name 2 amphoteric oxides

A

zinc oxides and aluminium oxides

25
Q

list 7 types of soluble salts

A
  1. group 1 salts
  2. ammonium salts
  3. nitrate salts
  4. ethanoate salts
  5. halides except silver & lead
  6. sulphates except CaSO4, SrSO4, BaSO4, PbSO4
  7. carbonates except gr 1 metal carbonates & ammonium carbonate
26
Q

list 2 types of insoluble salts

A
  1. silver & lead halides

2. CaSO4, SrSO4, BaSO4, PbSO4

27
Q

name the process of preparing soluble salts of fr 1, NH3 and Ba

A

titration

chemistry igcse 0620 (3 decks)

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