Fifty millilitres of 0.10 M are mixed with 50 mL of 0.10 M

CHEMISTRY · Single correct · AP · Chemistry · Acids and Bases · Acids and Bases

Problem

Fifty millilitres of 0.10 M

\text{NH}_3

are mixed with 50 mL of 0.10 M

\text{NH}_4\text{Cl}

. After the mixture is prepared, 10.0 mL of 0.20 M NaOH are added. What is the pH of the final solution? (For

\text{NH}_4^+

K_a = 5.6\times10^{-10}

.) (a)

9.47

(b)

9.25

(c)

9.62

(d)

8.88