Answer to Question #255891 in General Chemistry for Predator

Question

 A buffer solution of pH of 9.50 contains P mol of a weak base and 0.100 mol of a salt of its conjugate acid. When 100 cm³ of a 0.0600 mol.dm^-3 solution of hydrochloric acid was added to this buffer solution the pH changes by 0.200 pH units. Use this information to calculate the value of Kb for the weak base.

Answer 1

9.5+0.2= 9.7

9.7=(0.06+0.1)Kb

9.7= 0.1Kb

Kb = = 9.7/0.1

= 97