Solution: 1.0-L of a buffer solution contains 0.800 moles of acid HA (K a = 2.00 x 10 -6 ) and 0.800 moles of its conjugate base, A− . What is the change in pH upon the addition of 0.0500 moles of a strong base to this solution (with no change in volume)?
(a) +0.05
(b) +0.03
(c) +0.01
(d) -0.01
(e) -0.05

1.0-L of a buffer solution contains 0.800 moles of acid HA (K _{a} = 2.00 x 10 ^{-6} ) and 0.800 moles of its conjugate base, A^{−} . What is the __change__ in pH upon the addition of 0.0500 moles of a strong base to this solution (with no change in volume)?

(a) +0.05

(b) +0.03

(c) +0.01

(d) -0.01

(e) -0.05