State how the solubilities of group 2 hydroxides vary.
State the observation made in reaction 1.
Suggest a suitable reactant for reaction 2.
Identify product A.
Ba(OH)$_2$ is produced by the reaction of Ba with water. Write the equation for this reaction.
The mineral barytocalcite includes both BaCO$_3$ and CaCO$_3$. Each compound breaks down on heating. State which compound decomposes first when barytocalcite is heated. Explain your answer.
Construct an equation that represents the complete thermal decomposition of barytocalcite. The formula of barytocalcite is BaCa(CO$_3$)$_2$. $\text{BaCa(CO}_3)_2 \rightarrow \ldots$
Ba(OH)$_2$ is used to hydrolyse organic compounds. Figure 2.2 shows the reaction of B with Ba(OH)$_2$, then acidification. Draw the structures of the organic products formed in the process shown in Figure 2.2.