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What Is the Hydronium Ion Concentration in a Solution Prepared

Question 186

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 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 NaCN? Assume that the volumes of the solutions are additive and that K<sub>a</sub> = 4.9 × 10<sup>-10 </sup>for HCN. A) 4.9 × 10<sup>-11</sup> M B) 4.9 × 10<sup>-10</sup> M C) 4.9 × 10<sup>-9</sup> M D) 7.0 × 10<sup>-6</sup> M NaCN? Assume that the volumes of the solutions are additive and that Ka = 4.9 × 10-10 for HCN.


A) 4.9 × 10-11 M
B) 4.9 × 10-10 M
C) 4.9 × 10-9 M
D) 7.0 × 10-6 M

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