Calculate the pH after 50.0 mL of 0.1 M ammonia solution is treated with 25.0 mL of 0.10 M HCl. The dissociation constant of ammonia , `K_b=1.77xx10^(-5)`

Explanation

To calculate the pH after mixing 50.0 mL of 0.1 M ammonia solution with 25.0 mL of 0.1 M HCl, we can follow these steps:

### Step 1: Calculate the moles of ammonia (NH₃) and hydrochloric acid (HCl)

1. **Moles of NH₃:**
\[ \text{Moles of NH}_3 = \text{Concentration} \times \text{Volume} = 0.1 \, \text{M} \times 0.050 \, \text{L} = 0.005 \, \text{moles} \]
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