A 40 mL solution of weak base, BOH, is t...

A 40 mL solution of 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 mL and 20 mL of the acid respectively. The dissociation constant of the base will be

`1.82xx10^-3`

`1.82xx10^-4`

`1.82xx10^-5`

`1.82xx10^-6`

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