A 500 ML Sample of 0 $\times$ 10^-4)
A) 3

Multiple Choice

A 50.0 mL sample of 0.155 M HNO₂(aq) is titrated with 0.100 M NaOH(aq) .What is the pH of a solution after the addition of 25.0 mL of NaOH? (K_a of HNO₂ = 4.5 $\times$ 10^-4)

A) 3.02
B) 3.22
C) 3.67
D) 3.86
E) 4.05