Problem: What is the pH of 40.0mL of a solution that is 0.13 M CN- and 0.21 M in HCN? For HCN, use Ka = 4.9 x 10-9.

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What is the pH of 40.0mL of a solution that is 0.13 M CN- and 0.21 M in HCN? For HCN, use Ka = 4.9 x 10-9.