9.20. Complete the following chemical reactions.

(i) PbS(s) + H₂O₂ (aq) →

(ii) MnO₄^– (aq) + H₂O₂ (aq) →

(iii) CaO(s) + H₂O(g) →

(iv) AlCl₃(g) + H₂O(l)→

(v) Ca₃N₂(S) + H₂O(l) →

Classify the above into (a) hydrolysis, (b) redox and (c) hydration reactions.

9.20.  (i) PbS(s) +4H₂O₂(aq) → PbSO₄(s) + 4H₂O(l)

(ii) 2MnO₄^– (aq) +H₂O₂(aq) + 6H⁺(aq) → 2Mn (aq) + 8H₂O(l) + 5O₂(g)

(iii) CaO(s) + H₂O(g) → Ca(OH)₂(aq)

(iv) AlCl₃(aq) + 3H₂O(l) → Al(OH)₃(s) + 3HCl (aq)

(v) Ca₃N₂(s) + H₂O(l) → 3Ca(OH)₂(aq) + 2NH₃(aq)

(a) Hydrolysis reactions, (iii) (iv) and (v)

(b) Redox