Consider a Solution of 2

Multiple Choice

Consider a solution of 2.0 M HCN and 1.0 M NaCN (K_a for HCN = 6.2 × 10^-10) . Which of the following statements is true?

A) The solution is not a buffer because [HCN] is not equal to [CN^-].
B) [OH^-] > [H⁺]
C) The pH will be below 7.00 because the concentration of the acid is greater than that of the base.
D) The buffer will be more resistant to pH changes from addition of strong acid than to pH changes from addition of strong base.
E) All of these statements are false.