Solution P has a pH of 13. Solution Q has a pH of 6 and solution R has a pH of 2. Which solution:
(a) will liberate ammonia from ammonium sulphate on heating?
(b) is a strong acid?
(c) contains molecules as well as ions?

The solution is as follows:

1. The solution of P when heated with ammonium sulphate liberates ammonia. The reaction is as follows:

        (NH4)2SO4(aq) + BOH (aq)  2 NH3(g) + BSO4(aq) + H2O

2. As solution R has pH 2, it is the strongest acid.

3. Solution Q is slightly acidic, thus it has only molecules and ions.

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