Consider the following equilibrium:

$Al(H_{2}O{)}_4(OH{)}_{2(a_i)}^{**}Al(H_{2}O{)}_3(OH{)}_{3(s)}+H_{(aq)}^{+}$

a$)$ Some $HC{l}_{(ag)}$ is added to the equilibrium. What happens to the amount of solid $Al(H_{2}O{)}_3(OH{)}_3?$ Explain.

$(2$ marks$)$

b$)$ The $HCl$ is added at time $t_1$ and equilibrium is re$-$established at time $t_2.$ On the axis below, sketch what happens to the reverse reaction rate.

$(2$ marks$)$