Question

Write equations for the dissociation equilibrium reactions for the following acids and bases in water. Which of these are acid or dissociations?

a) HCl:

b) H2SO4 :

d) H2O(autoionization):

What is auto ionization?

e) HC2H3O(acetic acid):

f) NH3

Answer 1

a). HCl (aq)   + H2O (l)   --- > H3O⁺(aq)   + Cl^-(aq)

b). H2SO4 (aq) + H2O (l) ---- > H3O⁺(aq) +HSO4^-(aq)

       HSO4^-(aq)   + H2O (l) ---- > SO4^2- (aq) + H3O⁺(aq)

d) H2O (l) + H2O (l) ---- > H3O⁺(aq) + OH^-(aq)

Auto ionization is the process in which water itself ionizes in the water to form OH- and H3O+

e). HC2H3O (acetic acid):

   HC2H3O (aq)   + H2O (l) --- > C2H3O^-(aq)   + H3O⁺(aq)

f). NH3 (aq) + H2O (l) ---- > NH4⁺(aq) + OH- (aq)

H2O is amphoteric in nature since it produces H3O+ and OH-

H2SO4 , HCl , acetic acid are acid since these produce H3O+ in the solution.

NH3 produces OH- in the solution so it is base.