What is the hydronium ion concentration in an aqueous solution prepared by mixing 50.00 mL of 0.10 mol L-1 HCN with 50.00 mL of 0.010 mol L-1 NaCN? Assume that the volumes of the solutions are additive and that Ka =
A) 4.9 × 10-11 mol L-1
B) 4.9 × 10-10 mol L-1
C) 4.9 × 10-9 mol L-1
D) 7.0 × 10-6 mol L-1
Correct Answer:
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