(a)[5]
Describe how a pure sample of lead(II) iodide can be prepared by precipitation. Your response should give the practical steps and include an equation for the precipitation reaction.
(b(i))[2]
Describe a test for oxygen and state what you would see.
(b(ii))[2]
Complete the equation for the decomposition of hydrated zinc nitrate: $2\text{Zn(NO}_3)_2\cdot6\text{H}_2\text{O} \rightarrow \ldots\text{ZnO} + \ldots\text{NO}_2 + \text{O}_2 + \ldots\text{H}_2\text{O}$
(c(i))[2]
Describe how the student can verify that every last bit of water has been removed.
(c(ii))[4]
Determine the value of $x$ by using the steps given.