(a)[5]
State the formula for each of the calcium compounds $U$ to $Y$.
(b)[1]
Compound $Y$ can be changed into compound $V$. Outline how this reaction would be carried out in a school or college laboratory with a small sample of $Y$.
(c(i))
Construct balanced equations for these reactions: calcium forming compound $U$; compound $V$ forming compound $W$; compound $U$ forming compound $Y$.
(c(ii))[4]
Construct a balanced equation for the effect of heat on solid compound $W$.
(d)[1]
Suggest the formula of an aqueous reagent, other than an acid, for reaction 1.
(e)[2]
What would be observed when each of the following reactions is done in a test-tube? The production of $X$ from $\text{Ca(s)}$; the production of $X$ from $V$.