(a)[1]
Balance this reaction. $(\text{NH}_4)_2\text{SO}_4 + \ldots\text{NaOH} \rightarrow \ldots\text{NH}_3 + \ldots\text{H}_2\text{O} + \text{Na}_2\text{SO}_4$
(b)[1]
Calculate the percentage of ammonium sulfate present in this sample.
(c)[2]
Describe a simple test for ammonia gas.
(d(i))[1]
Name the process by which ammonia gas spreads throughout the laboratory.
(d(ii))[2]
Explain, in terms of particles, why ammonia gas spreads throughout the laboratory.
(d(iii))[1]
Explain why carbon dioxide gas, $\text{CO}_2$, spreads through the laboratory at a slower rate than ammonia gas, $\text{NH}_3$.
(e(i))[2]
Explain why a lower temperature and a higher pressure are not chosen.
(e(ii))[1]
State the function of iron in the Haber process.
(f(i))[1]
Explain what the term base means.
(f(ii))[1]
Suggest a possible pH for aqueous ammonia.