Chemistry F

Question 1

what is electrolysis

Answer 1

the breaking down of an ionic compound using electricity

Question 2

what is an ionic compound

Answer 2

an ionic compound is formed from a metal and a non metal

Question 3

ion

Answer 3

charged particle from an atom gaining or losing electrons

Question 4

metals form ions that are

Answer 4

positive

Question 5

non metals form ions that are

Answer 5

negative

Question 6

conditions required for electrolysis

Answer 6

ionic compound needs to earthier be molten or in aqeous solution so ions are free to move. This is known as an electrolyte

Question 7

anode

Answer 7

positive electrode

Question 8

cathode

Answer 8

negative electrode

Question 9

what happens at each electrode

Answer 9

at the positive electrode/anode, the ion gains electrons to form an element
at the negative electrode/cathode, the ion loses electrons to form an element

Question 10

rule for electrodes

Answer 10

if ion in anode is more reactive than oxygen than oxygen is produced. If ion in cathode is more reactive than hydrogen is produced.

Question 11

extraction of alluminium

Answer 11

alluminium oxide is dissolved in molten cryolite reducing energy cost as molten cryolite has a lower melting point than aluminium oxide