Electrolysis

Question 1

what is the purpose of electrolysis

Answer 1

is used to decompose ionic compounds

Question 2

what state must a substance be in to be eligible for electrolysis

Answer 2

molten or dissolved

Question 2

what is an ion

Answer 2

a charged particle

Question 3

what is electrolysis

Answer 3

a process in which electrical energy from a direct current is used to decompose an electrolyte

Question 4

what is an Anion

Answer 4

a negatively charged ions

Question 5

what is a cation

Answer 5

a positively charged ion

Question 6

what is the name given to the positive electrode and why

Answer 6

anode as it attracts negative ions

Question 7

what is the name given to the negative electrode

Answer 7

the cathode as it attracts positive ions

Question 8

explain the electrolysis of lead(Pb2+) bromide(Br-)

Answer 8

the positive lead cations are attracted to the cathode, gain electrons and are reduced to lead atoms with no charge . the bromine anions get attracted to the anode where they oxidise and lose electrons.

Question 9

what 2 ions are formed by water

Answer 9

H+ and OH-

Question 10

in the electrolysis of a solution, what is formed at the cathode

Answer 10

hydrogen gas is produced unless a metal that is less reactive than hydrogen is present, so a metal is produced instead

Question 11

in the electrolysis of a solution, what is formed at the anode

Answer 11

oxygen is produced (from OH- ions) unless the compound contains halide ions where a halide gas is produced by the