Question 5: Excess zinc carbonate is added to hydrochloric acid in the preparation of zinc chloride salt.

(i) Write an ionic equation for the reaction.

(ii) Why excess zinc carbonate is used?

(iii) Briefly explain how the zinc chloride crystals can be obtained.

(i)

(ii) To ensure that zinc carbonate is completely reacted with hydrochloric acid.

(iii) By adding zinc carbonate to the hydrochloric acid until there's excess solid left. Filter to remove excess unreacted zinc carbonate. Heat the filtrate until it's left with some water for crystallisation.