Brainscape's Knowledge GenomeTM

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


See full index

Chemistry > C4/Chemical Changes > Flashcards

C4/Chemical Changes Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Chemistry flashcards Periodic Table flashcards Chemistry 101 flashcards Organic Chemistry 101 flashcards
1
Q

oxidation is the loss of gain of oxygen?

A

gain

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

cooper+oxygen—>copper oxide.

what has been oxidised?

A

copper

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

what type of ions do metals make?

A

positive

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

what happens when a more reactive metal is placed into a solution of a less reactive metal?

A

a displacement reaction

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

which metal is more reactive?

lithium, sodium or potassium

A

potassium

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

which metal forms it’s ion easier?

lithium, sodium or potassium

A

potassium

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

what is an ore?

A

a rock that contains metal compounds

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

name 2 ways to extract metals from their ores

A

heating with carbon

electrolysis

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

what is reduction in terms of oxygen?

A

losing oxygen

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

copper oxide+carbon—> copper+carbon dioxide

what has been reduced and what has been oxidised?

A

copper oxide reduced to copper

carbon oxidised to carbon dioxide

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

why can copper be extracted from its ore by heating it with carbon but you need to use electrolysis to extract aluminium from its ore?

A

copper is less reactive than carbon so the carbon will reduce the copper.
aluminium is more reactive than carbon so no reaction will occur if heated with carbon.

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

what does OILRIG stand for?

A 
oxidation
is 
lost
reduction
is 
gain
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is oxidation in terms of electrons?

A

loss of electrons

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

what is reduction in terms of electrons?

A

gaining electrons

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

what name is given to a reaction where oxidation and reduction both take place?

A

REDOX

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

what type of salts does hydrochloric acid make?

A

chlorides

17
Q

what types of salts does sulphuric acid make?

A

sulphites

18
Q

what type of salts does nitric acid make?

A

nitrates

19
Q

what pH are acidic substances?

A

0-6

20
Q

what pH are alkaline substances?

A

8-14

21
Q

what pH are neutral substances?

A

7

22
Q

what type of acid is fully ionised in water?

A

strong

23
Q

give 3 examples of strong acids

A

hydrochloric, sulphuric and nitric

24
Q

ethanoic, citric and carbonic are all examples of what type of acid?

A

weak

25
Q

what happens to the ions in an ionic substance when they are dissolved in solution?

A

the ions dissociate(are free to move)

26
Q

what name is given to the liquids that ionic substances are dissolved in before electrolysis can happen?

A

electrolytes

27
Q

what is the name of the negative electrode?

A

cathode

28
Q

what is the name of the positive electrode?

A

an ode

29
Q

which electrode are negative ions attracted towards?

A

annode, positive electrode

30
Q

what does the world molten mean?

A

a melted substance

31
Q

what is produced at each electrode during the electrolysis of molten lead bromide?

A

cathode will produce lead

annode will produce bromine

32
Q

when is electrolysis better/more cost effective at extracting metals from their ores than reduction with carbon?

A

when the metal is more reactive than carbon

33
Q

during the electrolysis of the aluminium ore bauxite, why is the bauxite dissolved in cryolite?

A

lowers the melting point of bauxite
more cost effective
uses less energy

34
Q

why does the annode need to be resolved every few weeks during the electrolysis of bauxite?

A

the annode gets worn away as carbon dioxide is made from the oxygen in bauxite and the carbon in the annode

35
Q

what is produced at the negative electrode if the metal in solution is more reactive than hydrogen?

A

hydrogen

36
Q

what is produced at the positive electrode if the ionic substance is dissolved in water?

A

oxygen unless a halide ion (group7) is in the ionic compound

37
Q

what is produced at each electrode during the electrolysis of the following solutions dissolved in water: sodium chloride?

A

cathode: hydrogen
annode: oxygen

Chemistry (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions