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Nat 5 Chemistry > Unit 1 > Flashcards

Unit 1 Flashcards

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1
Q

What is the mass number equal to?

A

Protons + neutrons

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2
Q

What are the neutrons equal to?

A

Mass - atomic OR mass - protons

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3
Q

What is an isotope?

A

Atoms with the same number of protons but a different number of neutrons

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4
Q

How do you calculate the average rate of reaction?

A

Change in volume / change in time

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5
Q

Give examples of how a reaction can be made faster

A

Bigger surface area, higher temperature, higher concentration, catalyst

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6
Q

On a reaction rate graph what indicates a faster reaction rate?

A

Steeper slope

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7
Q

Covalent molecular bonding is between what?

A

Non-metals

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8
Q

Covalent network bonding is between what?

A

Non-metals (B,C,Si)

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9
Q

Ionic bonding is between what?

A

Metal + non-metal

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10
Q

Metallic bonding is between what?

A

Metals

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11
Q

In a covalent molecular, what forces hold the molecules together?

A

Weak Van der Waals forces

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12
Q

Covalent molecular share what to form full outer shells?

A

Unpaired outer electrons

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13
Q

In a covalent molecular what holds the atoms together?

A

Attraction of two positive nuclei

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14
Q

Do covalent molecular conduct?

A

No

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15
Q

Do CM dissolve in water?

A

No

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16
Q

Do CM have a high or low melting/boiling point?

A

Low

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17
Q

Do CN conduct?

A

No

18
Q

Do CN dissolve in water?

A

No

19
Q

Do CN have a high or low melting/boiling point?

A

High

20
Q

Do IL conduct?

A

Yes in molten or solution

21
Q

Do IL dissolve in water?

A

Yes

22
Q

Do IL have a high or low melting/boiling point?

A

High

23
Q

How do you calculate relative atomic mass?

A

Total mass of 100 atoms/ 100 (See ring binder for example)

24
Q

How does an acid form?

A

Non-metal oxide + water -> acid

25
Q

How does an alkali form?

A

Metal oxide + water -> alkali

26
Q

What is electrolysis?

A

When current/electricity is passed through a solution and breaks it up (ions are free to move)

27
Q

Why do substances conduct electricity?

A

The ions are free to move

28
Q

What is neutralisation?

A

When the H+ ions of an acid or the OH- ions of an alkali are removed to give a solution with a pH of 7

29
Q

Acid + alkali -> ?

A

Salt + water

30
Q

Acid + metal oxide -> ?

A

Salt + water

31
Q

Acid + metal carbonate -> ?

A

salt + water + CO2

32
Q

Acid + MAZIT metal -> ?

A

Salt + hydrogen

33
Q

When an acid is diluted what happens?

A
  • pH increases towards neutral
  • acidity decreases
  • concentration of H+ ions decrease
34
Q

When an alkali is diluted what happens?

A
  • pH decreases towards 7
  • alkalinity decreases
  • concentration of OH- ions decrease
35
Q

What are spectator ions?

A

Ions which do not take part in a chemical reaction

36
Q

What experiment is carried out for neutralisation?

A

Volumetric titration

37
Q

What is added to a titration to show neutralisation?

A

Indicator

38
Q

In a titration what is used to measure the acid?

A

Burette

39
Q

In a titration what is the alkali added with?

A

A pipette

40
Q

What is the atomic number equal to?

A

Protons, electrons

Nat 5 Chemistry (3 decks)

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