Electrolysis / Cathodes and Anodes Flashcards

1
Q

define electrolysis

A

splitting up ionic compounds using electricity

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

define electrode

A

rod that conducts electricity in pairs , one negative and one positive

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

define electrolyte

A

ionic solution broken down by electrolysis

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

what does PANIC stand for

A
positive 
anode
negative
is
cathode
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is attracted to snides

A

negative ions / non metals

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

what is attracted to cathodes

A

positive ions / metals

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

what is the half equation for an anode and a halogen ion

A

2__ —> __ + 2e

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

what is the half equation for an anode and a non halogen

A

4OH—> 2H20 +O2 +4e

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

what is produced by an anode if the ion is a halogen

A

a halogen

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

what is produced by an anode if the ion is a non halogen

A

oxygen

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

what is the cathode equation of the metal is more reactive than hydrogen

A

2H +2e —> H2

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

what is the cathode equation if the metal ion is less reactive than hydrogen

A

metal {3+} + {3}e —> metal

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

what is produced by a cathode if the metal ion is more reactive than hydrogen

A

hydrogen

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

what is produced by a cathode when the metal ion is less reactive than hydrogen

A

metal

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

what does a cryolite do

A

reduces the melting point of ore which means less energy is required for electrolysis

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

give an advantage of cryolite

A

cheaper to produce pure metals using metal ore