A 40 mL solution of a weak base, BOH is titrated with 0.1 N HCl solution. The pH of the solution is found to be

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Q 2616823770.     A 40 mL solution of a weak base, BOH is titrated with 0.1 N HCl solution. The pH of the solution is found to be 10.04 and 9.14 after the addition of 5.0 mL and 20.0 mL of the acid respectively. Find out the dissociation constant of the base.
JEE 1991
A

K_b =6.8 xx 10^(-5)

B

K_b =1.8 xx 10^(-5)

C

K_b =3.8 xx 10^(-5)

D

K_b =0.8 xx 10^(-5)

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