MAY/JUNE 2021

Question 1

What is electolysis?

Answer 1

electrolysis is the decomposition of an electrolyte by the passage of an electric current

Question 2

what is one material that could be used as an inert electrode in the electrolysis of aqueous copper(II) sulfate

Answer 2

platinum or graphite

Question 3

identify all the ions present in the electrolyte used in the experiment

Answer 3

Cu2+ , SO4+ , H+ , OH-

Question 4

calculate the quantity of electricity which passed through the copper(II) sulfate when 3.5 A flowed in one hour
q=it

Answer 4

1. convert hours to seconds

3.5(3600)