Consider a Solution of 2 $\times$ 10^-10)

question 68

Multiple Choice

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

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

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