Question
Chemistry Question on Law Of Chemical Equilibrium And Equilibrium Constant
The degree of ionization of a 0.1M bromoacetic acid solution is 0.132. Calculate the pH of the solution and the pKa of bromoacetic acid.
Answer
Degree of ionization, α = 0.132
Concentration, c = 0.1 M
Thus, the concentration of H3O + = c.α = 0.1 × 0.132 = 0.0132
pH = - log[H+] = -log(0.0132) = 1.879 : 1.88
Now, Ka = Ca2 = 0.1 × (0.132)2 = Ka = .0017 = pKa = 2.75