Assuming complete dissociation, calculate the pH of the following solutions:
(i)0.003 M HCl , (ii)0.002 M HBr , (iii)0.002 M KOH , (iv)0.005 M NaOH
Arrange these in the decreasing order of pH value and assuming complete dissociation:

Explanation

To calculate the pH of the given solutions and arrange them in decreasing order of pH, we will follow these steps:

### Step 1: Calculate the pH of 0.003 M HCl
1. **Dissociation**: HCl completely dissociates into H⁺ and Cl⁻ ions.
- \[ \text{HCl} \rightarrow \text{H}^+ + \text{Cl}^- \]
- Concentration of H⁺ = 0.003 M

2. **Calculate pH**:
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