(a(i))[1]
State what is meant by the state symbol (aq).
(a(ii))[1]
State the separation method used to remove the excess solid zinc oxide from the reaction mixture.
(b(i))[2]
Name the acid and the alkali that were used.
(b(ii))[2]
Complete the general equation for neutralisation reactions. $\text{H}^+ + .......... \rightarrow ..........$
(b(iii))[1]
Neutralisation reactions are exothermic. Define what is meant by exothermic.
(b(iv))[1]
Explain how Fig. 7.1 indicates that the reaction is exothermic.
(c)[2]
State the colour shown by methyl orange at pH 2 and at pH 12.