Predicting products of electrolysis

Question 1

which metals more reactive than hydrogen and which are less?

Answer 1

copper
silver
gold
hydrogen
iron
zinc
carbon
aluminium
magnesium
calcium
sodium
potassium

Question 2

Explain what products are produced in an aqueous solution during electrolysis

Answer 2

metal more reactive than hydrogen =hydrogen gas produced cathode
less reactive=solid layer of metal formed
if OH- ions (from water) and halide ions present molecules of em will be formed.
if not oxygen produced

Question 3

What are halide ions?

Answer 3

bromine,chlorine and iodine

Question 4

whats the difference between using copper electrode and inert electrodes?

Answer 4

mass of anode -

and cathode + bc copper transferred from a to c

Question 5

Describe how electrolysis is used to make copper pure.

Answer 5

use copper elctrodes
A starts off as impure copper
Electrolyte-copper sulfate solution
C-pure copper
impure c at A oxidised dissolving into E form c ions
c ions reduced at pure copper C and + to it as layer of pure copper
impurities from A sink to bottom of cell =sludge.