Question:
Which of the following are present in a dilute aqueous solution of hydrochloric acid ?
(a) H3O+ + Cl–
(b) H3O+ + OH–
(c) Cl– + OH–
(d) unionised HCl
Solution:
(a). HCl will react with water as follows :
HCl (l) + H2O(l) ———> H3O+(aq) + Cl–(aq)