A buffer solution contains 0.40 mol of ammonium hydroxide and 0.50 mol of ammonium chloride to make a buffer solution of 1 L. Calculate the pH of the resulting buffer solution. Dissociation constant of ammonium hydroxide at `25^(@)C` is `1.81xx10^(-5)`.

Explanation

To calculate the pH of the buffer solution containing ammonium hydroxide (NH4OH) and ammonium chloride (NH4Cl), we will follow these steps:

### Step 1: Identify the components of the buffer solution
The buffer solution consists of:
- Weak base: Ammonium hydroxide (NH4OH) with a concentration of 0.40 mol in 1 L.
- Conjugate acid (salt): Ammonium chloride (NH4Cl) with a concentration of 0.50 mol in 1 L.

### Step 2: Calculate the concentrations
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