(a(i))[1]
Write a chemical equation for the decomposition of calcium nitrate.
(a(ii))[3]
Describe how the decomposition temperature changes for the Group 2 nitrates. Explain your answer.
(b)[4]
A $0.333\,\text{g}$ sample of strontium oxide, $\text{SrO}$, is fully dissolved in distilled water to make strontium hydroxide, $\text{Sr(OH)}_2$. The solution is transferred to a volumetric flask and topped up with distilled water to $250.0\,\text{cm}^3$. Calculate the $\text{pH}$ of this solution at $298\,\text{K}$. Give your answer to two decimal places.