The statement of kb is "[C5H5NH+][OH-]/[C5H5N]"
The base dissociation constant is defined as Kb. In water, the base dissociation constant is a measurement of how efficiently a base dissociates into its component ions.
The hydroxide ion is formed when weak bases react with water, as stated in the general equation below, where B is the parent base and BH+ is its conjugate acid:
B(aq) + H2O(l) ⇌ BH+ (aq) + OH−(aq)
The base dissociation constant (Kb), also known as the base ionisation constant, is the equilibrium constant for this reaction:
Kb = [BH+][OH−]/[B]
From the given equation, base dissociation constant comes out to be,
Kb = [C5H5NH+][OH-]/[C5H5N]
Hence the correct answer is Kb = [C5H5NH+][OH-]/[C5H5N]
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