Question

Which of the following is in Ionic Equilibrium?

(a) 2AgI + Na2S \(\rightleftharpoons\)Ag2S + 2NaI

(b) 4 NH3 + 5 O2 \(\rightleftharpoons\)4 NO + 6 H2O

(c) TiCl4 + 2 H2O \(\rightleftharpoons\)TiO2 + 4 HCl

(d) H2O + H2O \(\rightleftharpoons\)H3O^+ + OH^–

The question was posed to me in an online quiz.

My doubt stems from Ionic Equilibrium in Solution in division Equilibrium of Chemistry – Class 11

Answer 1

Right answer is (d) H2O + H2O \(\rightleftharpoons\)H3O^+ + OH^–

For explanation I would say: Only H2O + H2O \(\rightleftharpoons\)H3O^+ + OH^– is in ionic equilibrium. As the equilibrium established between the unionized molecules and the ions in the solution of weak electrolytes is known as Ionic Equilibrium.