Question: The following data is obtained when a weak base, Y, is titrated with HNO3. Volume of Ysolution: 10.0 mL Volume of HNO3 to reach equivalence:

The following data is obtained when a weak base, Y, is titrated with HNO3. Volume of Ysolution: 10.0 mL Volume of HNO3 to reach equivalence: 12.5 mL Initial pH of Ysolution: 12.0 pH after 6.25 mL of HNO3 added: 10.8

1. Calculate the Kb of this weak base.

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