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6 Questions around this concept.
The relation between Ka,Kb and Kw can be understand by the following reaction.
Base Conjugate acid
The equilibrium constant Kb for base NH3 is given as:
Again, the reaction is:
The equilibrium constant Ka for conjugate acid NH4+ is given as:
Thus, Ka x Kb = [H3O+][OH-] = Kw
Thus, Ka ∝ 1/Kb at a given temperature
Therefore, if Ka of acid increases, then Kb of the conjugate base decreases. In other words, the conjugate base of strong acid is a weak base and vice-versa.
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Chemistry Part I Textbook for Class XI
Page No. : 222
Line : 22
June 23, 2019
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