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Y8 EOY > Chemistry EOY > Flashcards

Chemistry EOY Flashcards

1
Q

What does a chemical formulae tell us?

A

Which elements are in a compound and how many atoms of each element there are

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2
Q

What is an indicator?

A

A substance that changes colour in acid, alkaline or neutral solutions

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3
Q

What will turn red in universal indicator?

A

Acids

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4
Q

What will turn green in universal indicator?

A

Neutral substances

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5
Q

What will turn blue/purple in universal indicator?

A

Alkalis

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6
Q

Give an example of a weak acid

A

Vinegar

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7
Q

Give an example of a weak alkali

A

Toothpaste

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8
Q

Give an example of a strong acid

A

Hydrochloric acid

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9
Q

Give an example of a strong alkali

A

Oven cleaner

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10
Q

Give an example of a neutral substance

A

Water

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11
Q

What are acids on the pH scale?

A

0-6

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12
Q

What are alkalis on the pH scale?

A

8-14

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13
Q

What is neutral on the pH scale?

A

7

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14
Q

What occurs when an acid and an alkali mix?

A

A neutralisation reaction

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15
Q

Are all bases alkalis?

A

No. Alkalis are soluble bases

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16
Q

What is a base?

A

Something that neutralises an acid

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17
Q

Is a neutralisation reaction exothermic or endothermic?

A

Endothermic

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18
Q

What does exothermic mean?

A

Takes in heat- cools down

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19
Q

What does endothermic mean?

A

Gives off heat- warms up

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20
Q

Finish the word equation:
Acid + Alkali/Base —>

A

a salt + water

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21
Q

Finish the word equation:
Sodium hydroxide + Nitric acid —>

A

Sodium nitrate + water

22
Q

What does concentrated mean?

A

Lots of acid/alkali particles

23
Q

What does dilute mean?

A

Not many acid/alkali particles

24
Q

What indicator shows acids, alkalis and neutral?

A

Universal indicator

25
Q

Finish the word equation:
Metal + Oxygen —>

A

Metal oxide

26
Q

What is it called when a more reactive element takes the place of a less reactive element?

A

A displacement reaction

27
Q

Name three metals

A

Any metal. e.g. magnesium, tin, copper

28
Q

Name three metal compounds

A

Any metal compounds. e.g. Magnesium oxide, zinc nitrate, copper sulphate

29
Q

Why is it not necessary to react a metal to its own metal compound?

A

There will be no change as it cannot displace itself

30
Q

Why is copper used for water pipes?

A

It doesn’t react with water

31
Q

Why is copper used in electrical wires?

A

It is flexible and can conduct electricity

32
Q

What are ores?

A

Ores are compound that contain metals combined with other elements

33
Q

Finish the word equation:
Iron ore + carbon —>

A

Carbon dioxide + iron

34
Q

What are metal that are pure metal in the ground called?

A

Native state

35
Q

What is the process of removing a metal from it’s ore called?

A

Smelting

36
Q

What element does smelting use in a displacement reaction?

A

Carbon

37
Q

What is a period (in chemistry)?

A

A row going across

38
Q

What is a group?

A

A column going down

39
Q

What is group 1 called?

A

Alkaline metals

40
Q

What is group 2 called?

A

Alkaline earth metals

41
Q

What is the bit in the middle called? (periodic table)

A

Transition metals

42
Q

What is group 7 called?

A

Halogens

43
Q

What is group 8/0 called?

A

Noble gases

44
Q

What might be similar about elements in the same group?

A

They have the same amount of electrons in the outer shell

45
Q

Which side of the periodic table are the metals on?

A

The left

46
Q

How do group 1 react with water? What are the products?

A

As the period gets higher, they become more rigorous. It creates hydrogen

47
Q

Name 3 possible observations during any chemical reaction

A
  1. A change in colour
  2. A change in temperature
  3. Something is made
48
Q

Where are halogens more reactive?

A

At the top

49
Q

Are halogens metals or non-metals?

A

Non-metals

50
Q

What percentage of the air is nitrogen?

A

78%

Y8 EOY (13 decks)

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