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chemistry > 3.1.1 - chemicals and observations > Flashcards

3.1.1 - chemicals and observations Flashcards

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1
Q

formula for water

A

H2O

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2
Q

formula for ammonia

A

NH3

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3
Q

formula for hydrochloric acid

A

HCl

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4
Q

formula for nitric acid

A

HNO3

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5
Q

formula for sulphuric acid

A

H2SO4

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6
Q

formula for methane

A

CH4

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7
Q

formula for sodium hydroxide

A

NaOH

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8
Q

formula for potassium hydroxide

A

KOH

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9
Q

formula for ammonium hydroxide

A

NH4OH

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10
Q

formula for carbon dioxide

A

CO2

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11
Q

formula for carbon monoxide

A

CO

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12
Q

formula for sulphur dioxide

A

SO2

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13
Q

what are the diatomic elements

A
  • bromine
  • oxygen
  • chlorine
  • iodine
  • hydrogen
  • nitrogen
  • fluorine
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14
Q

what pH is acid when using universal indicator and what colours could it be?

A

1 - 6
weak acid (3-6) - YELLOW
strong acid (1-3) - RED

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15
Q

what pH is neutral when using universal indicator and what colour would it be?

A

7
would be GREEN

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16
Q

what pH is alkali when using universal indicator and what colours could it be?

A

8 - 14
weak alkali (8-11) - LIGHT BLUE
strong alkali (11-14) - DARK BLUE/PURPLE

17
Q

what colour would methyl orange turn in an acid?

A

red

18
Q

what colour would methyl orange turn in a neutral substance?

A

yellow

19
Q

what colour would methyl orange turn in an alkali?

A

yellow

20
Q

what colour would phenolphthalein turn in an acid?

A

colourless

21
Q

what colour would phenolphthalein turn in a neutral substance?

A

colourless

22
Q

what colour would phenolphthalein turn in an alkali?

A

pink

23
Q

what would happen if you added an acid to an alkali in methyl orange?

A

yellow -> orange

24
Q

what would happen if you added an alkali to an acid in methyl orange?

A

red -> orange

25
Q

what would happen if you added an acid to an alkali in phenolphthalein ?

A

pink -> colourless

26
Q

what would happen if you added an alkali to an acid in phenolphthalein ?

A

colourless -> pale pink

27
Q

what colour would red litmus turn in an acid?

A

red

28
Q

what colour would red litmus turn in a neutral solution?

A

stays red

29
Q

what colour would red litmus turn in an alkali?

A

blue

30
Q

what colour would blue litmus turn in an acid?

A

red

31
Q

what colour would blue litmus turn in a neutral substance?

A

stays blue

32
Q

what colour would blue litmus turn in an alkali?

A

blue

chemistry (45 decks)

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