What Is the Hydronium Ion Concentration in a Solution Prepared

question 135

Multiple Choice

What is the hydronium ion concentration in a solution prepared by mixing 50.00 mL of 0.10 mol L^-1 HCN with 50.00 mL of NaCN? Assume that the volumes of the solutions are additive and that K_a =

• A) 1.5 × 10^-10 mol L^-1
• B) 4.9 × 10^-10 mol L^-1
• C) 1.6 × 10^-9 mol L^-1
• D) 7.0 × 10^-6 mol L^-1

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