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HCN is a weak acid (Ka = 6.20 × 10–10) and so the salt, KCN, acts...

HCN is a weak acid (Ka = 6.20 × 10–10) and so the salt, KCN, acts as a weak base. What is the pH of a solution that is 0.0900 M in KCN at 25 °C?

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