Hydrolysis constant of salt derived from strong acid and weak base is 2 × 10–5. The dissociation constant of the weak base is
Question
Hydrolysis constant of salt derived from strong acid and weak base is 2 × 10–5. The dissociation constant of the weak base is
Solution
The hydrolysis constant (Kh) of a salt derived from a strong acid and a weak base is given by the formula:
Kh = Kw / Kb
Where: Kw is the ion product of water, and Kb is the base dissociation constant.
Given that Kh = 2 × 10^-5 and Kw (at 25 degrees Celsius) is 1 x 10^-14, we can rearrange the formula to solve for Kb:
Kb = Kw / Kh
Substituting the given values:
Kb = 1 x 10^-14 / 2 x 10^-5
Kb = 0.5 x 10^-9
So, the dissociation constant of the weak base is 0.5 x 10^-9.
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