Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemical Changes > Combined Higher > Flashcards

Combined Higher Flashcards

1
Q

What does reactivity mean?

A

How vigorously a substance chemically reacts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How can metals be ordered by their reactivity?

A

By comparing their reactions with water, acid and oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What name is given to a list of metals ordered by their reactivity?

A

Reactivity series

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In terms of electrons what makes some metals more reactive than others?

A

how easily they lose their outer electrons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Why are gold and silver found naturally as elements in the Earth’s crust?

A

They are very unreactive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is an ore?

A

Rock containing enough metal compound to be economically worth extracting

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How are metals less reactive than carbon extracted from their ores?

A

Reduction with carbon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

In terms of oxygen, what is oxidation?

A

Addition of oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

In terms of oxygen what is reduction?

A

Removal of oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why can metals like potassium and aluminium not be extracted by reduction with carbon?

A

They are more reactive than carbon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How are metals more reactive than carbon extracted from their ores?

A

Electrolysis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is a displacement reaction?

A

When a more reactive substance takes the place of a less reactive substance in a compound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is an ionic equation

A

Equation which shows the ions that have changed oxidation state with the spectator ions removed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What type of substance is given as ions in an ionic equation?

A

Ionic compounds in solution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is a spectator ion?

A

Ion that is unchanged in a reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a half equation?

A

An equation that shows whether a substance is losing or gaining electrons

17
Q

In terms of electrons what is oxidation?

A

loss of electrons

18
Q

In terms of electrons what is reduction?

A

Gain of electrons

19
Q

In terms of pH what is an acid?

A

pH 1-6

20
Q

In terms of Ph what is a neutral solution?

A

A solution of pH 7

21
Q

In terms of H+ ions, what is an acid?

A

A substance that releases H+ ions when dissolved in water

22
Q

What are the names and formula of 3 main acids?

A

Hydrochloric acid - HCl,
Sulfuric acid - H2SO4,
Nitric acid - HNO3

23
Q

How do you measure the pH of a substance?

A

Universal indicator or pH probe

24
Q

What is a strong acid?

A

An acid which complete ionises in water

25
Q

What is a weak acid?

A

An acid which only partially ionises in water

26
Q

What is a salt?

A

A compound formed when a metal ion takes the place of the Hydrogen ion in an acid

27
Q

What salts do sulfuric acid, hydrochloric acid and nitric acid form?

A

Sulfates, chlorides, nitrates

28
Q

What are the products of a reaction between a metal and an acid?

A

Salt + Hydrogen

29
Q

What are the products of a reaction between a metal hydroxide and an acid?

A

Salt + water

30
Q

What are the products of a reaction between a metal oxide and an acid?

A

Salt + water

31
Q

What are the products of a reaction between a metal carbonate and an acid?

A

Salt + water + carbon dioxide

32
Q

What is a base?

A

A substance that reacts with acids in neutralisation reactions

33
Q

What is an alkali?

A

A soluble base - a substance that dissolves in water to give a solution with pH 7

34
Q

What is a neutralisation reaction?

A

A reaction between an acid and a base to produce water

35
Q

What is the ionic equation for a reaction between an acid and an alkali?

A

H+ + OH- H2O

36
Q

How can you obtain a solid salt from a solution?

A

Crystallisation

37
Q

When an acid reacts with a metal which species is oxidised?

A

The metal ( it loses electrons) to form an ionic compound

38
Q

When an acid reacts with a metal which species is reduced?

A

Hydrogen ( It gains electrons) to be come H2

Chemical Changes (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions