C6

Question 0

Electrolysis needs…

Answer 0

An electrolyte - the liquid that the electric current flows through
A negative electrode the cathode
A positive electrode the anode
A direct current - power supply

Question 1

C6 : electrolysis is??

Answer 1

Ionic compounds are broken down by an electric current, negative ions are discharged at the positive electrode (anode). And positive are discharged at the cathode which is the negative electrode.

Question 2

Cations are…

Answer 2

Positively charges ions, attracted to the negative electrode.

Question 3

Anions are…

Answer 3

Negatively charged ions, attracted to the anode

Question 4

Electrolysis cannot happen in solids because…

Answer 4

There are no free moving electrons

Question 5

Fuel cells

Answer 5

A reaction between hydrogen and oxygen to create electricity

Question 6

Energy level diagrams

Answer 6

—————–|
|
Energy |. Energy is released
|
|_________________

                      Progress of reaction  Exothermic

Question 7

Fuel cells in spacecraft advantages

Answer 7

They have no moving parts
They are compact
They are lightweight

Question 8

Fuel cells in cars advantages

Answer 8

No emissions of carbon dioxide from the car

The earth has LOADS of water so it is a renewable source

Question 9

OIL RIG ?

Answer 9

Oxidation Is Loss

Reduction Is Gain

Question 10

Fuel cell reaction

Answer 10

Redox reaction-

Look in revision guide for half equations

Question 11

Fuel cells have a disadvantage

Answer 11

Fuel cells work with a posionous catalyst. These have to be disposed once a fuel cell has reached the end of its life