ELECTROLYSIS

Question 1

explain why a mixture is used as the electrolyte

Question 2

explain why the positive electrode must be continually replaced

Question 3

What is cryolite?

Answer 4

at the cathode (negative electrode), positively charged ions gain electrons and so the reactions are reductions

Answer 5

At the anode (positive electrode), negatively charged ions lose electrons and so the reactions are oxidations.

Answer 6

Electrolysis is used if the metal is too reactive to be extracted by reduction with carbon or if the metal reacts with carbon

Question 7

What are electrodes made of and why?

Answer 7

UNREACTIVE ad GOOD CONDUCTING metals to stop them interfering with the reaction:
Graphite
Copper

Question 8

Electrolysis of halides

Question 9

Molten and aqueous solutions