(a(i))[2]
Write an equation, with state symbols included, for the reaction that occurs when a sample of anhydrous calcium nitrate, $\text{Ca(NO}_3)_2$, is heated strongly in a test-tube.
(a(ii))[2]
Describe what will be observed during this reaction.
(b)[4]
Describe and explain how the solubility of the Group 2 sulfates changes down the group.