Calculate the hydrolysis constant, degree of hydrolysis and pH of 0.10 M KCN solution at `15^(@)`C . For HCN, `K_(a)=6.2xx10^(-10)`.

Explanation

To solve the problem, we need to calculate the hydrolysis constant (K_h), the degree of hydrolysis (α), and the pH of a 0.10 M KCN solution at 15°C, given that the dissociation constant (K_a) for HCN is \(6.2 \times 10^{-10}\).

### Step 1: Calculate the Hydrolysis Constant (K_h)

KCN is a salt formed from a strong base (KOH) and a weak acid (HCN). The hydrolysis of CN⁻ can be represented as:

\[ \text{CN}^- + \text{H}_2\text{O} \rightleftharpoons \text{HCN} + \text{OH}^- \]

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