(a(i))[3]
When $[\text{Cu(H}_2\text{O})_6]^{2+}$ reacts with excess aqueous sodium hydroxide, give the colour and state of the copper-containing product, write the ionic equation, and state the reaction type.
(a(ii))[3]
For the reaction of $[\text{Cu(H}_2\text{O})_6]^{2+}$ with excess aqueous ammonia, give the colour and state of the copper-containing product, write the ionic equation, and state the reaction type.
(b)[2]
Copper(I) oxide is introduced into hot dilute sulfuric acid. A blue solution, $X$, and a red-brown solid, $Y$, are produced. Suggest what $X$ and $Y$ are. State the reaction type.