(a)[2]
Write the equations for these two acid-base reactions.
(b)[2]
The pH of a $0.10\,\text{mol dm}^{-3}$ solution of $G$ is $11.3$. After $30\,\text{cm}^3$ of $0.10\,\text{mol dm}^{-3}$ $\text{HCl}$ has been added to $10\,\text{cm}^3$ of a $0.10\,\text{mol dm}^{-3}$ solution of $G$, the final pH becomes $1.6$. On the axes below, sketch the pH variation during this addition of $\text{HCl(aq)}$.