(a(i))[1]
Draw the structure of intermediate $X$ in the box above.
(a(ii))[3]
Suggest reagents and conditions for reaction 1, reaction 2, and reaction 3.
(b(i))[1]
Write an equation to show why aqueous solutions of ethylamine are alkaline.
(b(ii))[2]
Compare the basicities of ethylamine and ammonia. Explain your answer.
(c(i))[1]
Explain what is meant by the term buffer solution.
(c(ii))[2]
Write two equations to show how a solution containing a mixture of $\text{CH}_3\text{NH}_2$ and $\text{CH}_3\text{NH}_3\text{Cl}$ acts as a buffer.