(a(i))[3]
For the reaction between $[\text{Cu}(\text{H}_2\text{O})_6]^{2+}$ and excess aqueous sodium hydroxide, give the colour and physical state of the copper-containing species, write the ionic equation, and name the reaction type.
(a(ii))[3]
For the reaction of $[\text{Cu}(\text{H}_2\text{O})_6]^{2+}$ with excess aqueous ammonia, state the colour and physical state of the copper-containing species, give the ionic equation, and name 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. Name the reaction type.