(a)[3]
The carbonates and hydroxides of Group 2 elements follow similar patterns in thermal stability. Suggest and explain how the trend in the thermal stability of the Group 2 hydroxides changes.
(b(i))[1]
Calcium hydroxide is only slightly soluble in water. Write an equation to represent the dissociation of calcium hydroxide, $\text{Ca(OH)}_2$(s), in aqueous solution. Include state symbols.
(b(ii))[2]
Calculate the solubility, in $\text{mol dm}^{-3}$, for $\text{Ca(OH)}_2$. $[K_{sp}: \text{Ca(OH)}_2,\ 5.02 \times 10^{-6}\ \text{mol}^3\text{dm}^{-9}]$
(b(iii))[1]
Suggest how the solubility of $\text{Ca(OH)}_2$ in aqueous $\text{NaOH}$ compares with its solubility in water, and explain your answer.