Brainscape's Knowledge GenomeTM

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


See full index

Chemistry > Electrolysis > Flashcards

Electrolysis Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Chemistry flashcards Periodic Table flashcards Chemistry 101 flashcards Organic Chemistry 101 flashcards
0
Q

How do you chemically change an electrolyte

A

Electrolytes are chemically changed when an electric current is passed through them.

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

Define an electrolyte

A

An electrolyte is a substance that conducts electricity when dissolved in water.

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

Give 3 examples of electrolytes

A

Acids, bases and salt water

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

Define electrolysis

A

Electrolysis is the breaking up of a substance due to the passage of an electric current through it in an aqueous solution or when molten

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

In electrolysis what are the electrodes connected to?

A

The positive and negative terminals of a d.c power supply

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

How do you get electricity to flow through water in electrolysis?

A

Dip the electrodes in to an electrolyte

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

What is the name given to positive ions

A

Cations

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

State whether the cathode is positively or negatively charged

A

Negative

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

Which electrode are cations attracted to?

A

The cathode

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

What is the name given to negative ions?

A

Anions

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

State whether the anode is positively or negatively charged

A

Positive

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

Which electrode are anions attracted to?

A

Anode

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

Which electrode does oxidation take place?

A

Anode

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

Which electrode does reduction take place?

A

Cathode

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

Define electroplating

A

A layer of metal is put on to the surface of another metal

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

Give an example of an everyday item that has been electroplated

A

Cutlery is made from nickel and coated in silver

16
Q

Define electrolysis of an aqueous solution

A

This is a complex reaction due to the presence of a number of species

17
Q

In an aqueous solution water can be oxidised and reduce. Explain why this is

A

Water can be split into H+ ions and OH- ions. H+ (positive charge) is reduced at the cathode (negative charge. OH- (negative charge) is oxidised at the anode (positive charge)

18
Q

Name the factors that determine what is oxidised and reduced

A

Type of electrodes

The ease of oxidation and reduction of the different species

19
Q

Why can’t copper electrodes be used in the electrolysis of an aqueous solution

A

It would react with the solution

20
Q

Give an example of electrodes that wouldn’t react with the solution

A

Platinum electrodes

21
Q

In electrolysis of acidified water what 3 things are suspended in the solution?

A

2-

H+) Hydrogen (H20) Water & (So4

22
Q

Which is more easily oxidised water or sulfuric acid?

A

Water

23
Q

At the anode water is oxidised, represent this in an equation

A

_

H2O-> 2H + 1/2O2 +2e

24
Q

At the cathode hydrogen is reduced, represent this in an equation

A

+ _

2H + 2e -> H2

Chemistry (9 decks)

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