Question

10
5. Show the dissociation of the following
compounds on dissolving in water,
with the help of chemical equation
and write whether the proportion of
dissociation is small or large.
Hydrochloric acid, Sodium chloride,​

Answer 1

a) Hydrochloric acid (HCl)

HCl (g) Water→dissociation H+(aq) + Cl-(aq)

Hydrochloric acid is a strong acid, as on dissolving in water, it dissociates almost completely and the resulting aqueous solution contains mainly H+ ions and the concerned acidic radical. The proportion of dissociation is large.

b) Sodium chloride (NaCl)

NaCl (g) Water→dissociation Na+(aq) + Cl-(aq)

When an ionic compound begins to dissolve in water, the water molecules push themselves in between the positive and negative ions of the compound and separate them from each other. The proportion of dissociation is large.