Brainscape's Knowledge GenomeTM

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


See full index

GCSE AQA Chemistry > C6 Electrolysis > Flashcards

C6 Electrolysis Flashcards

1
Q

What is an electrolyte?

A

A compound that is broken down by electrolysis

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

What are the two electrodes?

A

Cathode

Anode

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

What is the negative electrode?

A

Cathode

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

What is the positive electrode?

A

Anode

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

What happens during electrolysis?

A

Positively charged ions move to the cathode, negatively charges ions move to the anode

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

What is reduction?

A

Gain of electrons

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

What is oxidation?

A

Loss of electrons

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

Why are the electrodes made of an unreactive substance?

A

So they electrodes don’t react with the electrolyte or the products made in elecrolysis

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

What reaction is at the negative electrode?

A

Reduction reaction(loss of electrons)

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

What reaction is at the anode(positive electrode)?

A

Oxidation(gain of electrons’

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

Which metals are extracted through electrolysis?

A

Metals that are more reactive than carbon

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

What is used to reduce the melting point of aluminium oxide?

A

Cryolite

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

What is the half equation for aluminium at the cathode?(reduction reaction)

A

Al3+ + 3e-=AL

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

What is the half equation for oxygen at the anode?(oxidation reaction)

A

O2- = O-2e-

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

Why must the anode be replaced regularly?(GOT THIS WRONG IN DECEMBER MOCKS)

A

The oxygen molecules produced at the anode react with the graphite forming carbon dioxide gas

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

Water molecules ionise or split forming ________^and ___________

A
  • hydrogen ions(h+ ions)

- hydroxide ions(OH- ions)

17
Q

The h+ ions (from ionised water) is attracted to the?

A

Cathode

18
Q

The OH- ions(from ionised water)is attracted to the ______

A

Anode

19
Q

In aqueous solutions, Hydrogen is produced at the cathode if _______________

A

Them metal is more reactive than hydrogen

20
Q

Para nos otros

A

Sui

GCSE AQA Chemistry (22 decks)

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