(a(i))[1]
Add the state symbol for water at room temperature to complete the symbol equation.
(a(ii))[1]
Name the method used to remove the excess solid zinc oxide from the reaction mixture.
(a(iii))[2]
Describe how you would obtain dry crystals of zinc chloride from an aqueous solution of zinc chloride.
(b)[1]
From the list, choose the ion that is found in every acid: Cl$^-$, H$^+$, O$^{2-}$, OH$^-$.
(c(i))[1]
What is the meaning of exothermic?
(c(ii))[1]
Complete Fig. 7.1 by labelling the diagram with these formulae: ZnO + 2HCl; ZnCl$_2$ + H$_2$O.
(c(iii))[1]
Explain how Fig. 7.1 shows that the reaction is exothermic.
(d)[2]
State the litmus colour at pH 2 and at pH 12.