Question

Write equation for the reaction between hydrochloric acid with each of the following:
(a) bleaching powder
(b) lead nitrate solution
(c) manganese dioxide
(d) oxide of lead

Answer 1

The reaction of hydrochloric acid with:

(a) Bleaching powder:

CaOCl₂(s) + 2HCl(aq) → CaCl₂(aq) + Cl₂(g) + H₂O(l)

(b) Lead nitrate solution:

Pb(NO₃)₂(aq) + 2HCl(aq) → PbCl₂(s) + 2HNO₃(aq)
White ppt.

(c) Manganese dioxide:

MnO₂(s) + 4HCl(aq) → MnCl₂ (aq) + 2H₂O(l) + Cl₂(g)
Manganese Manganese
dioxide chloride
(black)

(d) Oxide of lead (red lead):

Pb₃O₄(s) + 8HCl(aq) → 3PbCl₂ (aq) + 4H₂O(l) + Cl₂(g)
Trilead Lead chloride
tetroxide
(red)