C6 Electrolysis

Question 1

what is electrolysis

Answer 1

the process of splitting a compound into its separate elements by passing electricity through an electrolyte

Question 2

electrolysis in molten / aqueous solutions

Answer 2

ions are free to move and carry their charge to the electrodes

Question 3

cathode

Answer 3

negative electrode- attracts positive ions( metal) ions reduced at cathode

Question 4

anode

Answer 4

positive electrode( right)- attracts negative ions - ions oxidised here

Question 5

in aqueous solutions

Answer 5

hydrogen (cathode) and hydroxide (anode) produced

Question 6

aluminium ore

Answer 6

bauxite - has a very high melting point

Question 7

process of aluminium extraction

Answer 7

purified from bauxite
mixed with cryolite to lower MP
melted
then usual electrolysis

Question 8

cons of aluminium extraction

Answer 8

requires a lot of energy to melt the oxide and a lot of energy to pass through in electrolysis

Question 9

pros of Al

Answer 9

useful metal (pots, cans, planes, power cables)