(a(i))[2]
Define what electrolysis means.
(a(ii))[1]
Identify an inert metal suitable for use as the electrodes.
(a(iii))[2]
State the product formed at each electrode: positive electrode; negative electrode.
(b(i))[1]
Name the ion that makes a solution alkaline.
(b(ii))[1]
Choose the pH value for an alkaline solution: pH1, pH5, pH7 or pH9.
(b(iii))[2]
Dilute hydrochloric acid is added to a litmus solution that is alkaline until the acid is in excess. State how the litmus colour changes from ... to ... .
(c(i))[1]
Name the gas that makes limewater turn milky.
(c(ii))[1]
Name the type of reaction that takes place when calcium carbonate is heated.