Label the anode on Fig. 3.1.
Name a non-metal that may be used for the anode.
Name the product made at each electrode. positive electrode; negative electrode.
Use your knowledge of the reactivity of magnesium to suggest why an unreactive gas is blown into the electrolysis cell.
Alloys of magnesium and aluminium are used to make aircraft. State the meaning of the term alloy.
Write the formula of the ion found in all acids.
Name the gas given off when hydrochloric acid reacts with magnesium.
Dilute hydrochloric acid is added to a solution of thymolphthalein in aqueous sodium hydroxide until the acid is in excess. State the colour change of the thymolphthalein from ... to ...
Name the indicator that can be used to determine the pH of a sample of dilute hydrochloric acid.