Electrolysis

Question 0

What is the electrolyte?

Answer 0

The liquid that conducts the electricity.

Question 1

What happens if you pass an electric current through an ionic substance that molten or in solution?

Answer 1

It breaks it down into the elements that it is made of.

Question 2

What is the liquid that conducts electricity called?

Answer 2

The electrolyte.

Question 3

What do you electrolytes contain?

Answer 3

Free electrons.

This is because they are usually the molten or dissolved ionic substance

Question 4

In electrolysis what conducts electricity?

Answer 4

The free ions and delocalised electrons.

Question 5

What is reduction in electrolysis?

Answer 5

The gain of electrons.

Question 6

What is oxidation?

Answer 6

The loss of electrons.

Question 7

What happens the positive ions in electrolysis?

Answer 7

They are attracted to the negative electrode here they gain electrons. This is reduction.

Question 8

What happens to negative electrons in electrolysis?

Answer 8

They are attracted to the positive electrode.

Here they lose electrons, this is called oxidation.

Question 9

What are the products of the electrolysis of sodium chloride solution?

Answer 9

Hydrogen
Chlorine
Sodium hydroxide

Question 10

In electrolysis of sodium chloride solution what is produced in the negative electrode?

Answer 10

Hydrogen is produced.

Two hydrogen ions except two electrons and then become one hydrogen molecule

Question 11

In the electrolysis of sodium chloride solution what is produced on the positive electrode?

Answer 11

Chlorine is produced at the positive electrode.

To chlorine ions gain electrons and become one chlorine molecule.

Question 12

How is aluminium extracted?

Answer 12

Electrolysis.

Question 13

What is the ore of aluminium?

Answer 13

Bauxite.

Question 14

What is bauxite made of?

Answer 14

Aluminium oxide

Question 15

Why is cryolite used in the electrolysis of aluminium?

Answer 15

To lower temperature and costs.

This is because aluminium has a high melting point.

Question 16

What are the electrodes made of in the electrolysis of aluminium?

Answer 16

Carbon.

Question 17

Why is Carbon used as the electrodes material in the electrolysis of aluminium?

Answer 17

Because it is a good conductor of electricity.

Question 18

What forms at the negative electrode in the electrolysis of aluminium?

Answer 18

Aluminium.

Question 19

What forms at the positive electrode in the electrolysis of aluminium?

Answer 19

Oxygen.

Question 20

Where is aluminium produced in the electrolysis of aluminium?

Answer 20

The negative electrode which is also the outer lining of the container

Question 21

Where is oxygen produced in the electrolysis of aluminium?

Answer 21

On the positive electrode.

These are the rods made of carbon

Question 22

What is electroplating?

Answer 22

Using electrolysis to cope the surface of an object with another metal

Question 23

In electroplating where do you put the object you want to plate?

Answer 23

The negative electrode.

Question 24

Electroplating what goes on the negative electrode?

Answer 24

The object you want to plate.

Question 25

In electroplating where do you put the metal you want to play the object with?

Answer 25

On the positive electrode.

Question 26

Give two examples of the uses of electroplating.

Answer 26

Decoration
It is attractive and is cheaper than having the whole object.
Conduction
used in electrical circuits to help them conduct electricity.