What Is the Hydronium Ion Concentration in a Solution Prepared

question 74

Multiple Choice

What is the hydronium ion concentration in a solution prepared by mixing 50.00 mL of 0.10 M HCN with 50.00 mL of 0.030 M NaCN? Assume that the volumes of the solutions are additive and that
K_a = 4.9 × 10^-10 for HCN.

• A)1)5 × 10^{- 10} M
• B)4)9 × 10^-10 M
• C)1)6 × 10^{- 9} M
• D)7)0 × 10^-6 M

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