Question

Solution P has a pH of 13, solution Q has a pH of 6, and solution R has a pH of 2. Which solution:

1. will liberate ammonia from ammonium sulphate on heating?
2. is a strong acid?
3. contains molecules as well as ions?

Answer 1

1. Solution P with pH 13 will liberate ammonia from ammonium sulphate on heating. When alkalis are warmed with an ammonia salt, ammonia gas is given out.
2. Number 2 on the pH scale represents a strong acid. Therefore, solution R with pH 2 is a Strong acid.
3. As Q with pH 6 is a weak acid and will not be able to completely dissociate into ions. Hence, it will have molecules and ions both.