Calculate the `H_(3)O^(+)` and `OH^(-)` ion concen- trations at `25^(@)`C in
(i) 0.02 N HCl solution (ii) 0.005 N NaOH solution

Explanation

To solve the problem of calculating the `H3O^+` and `OH^-` ion concentrations at 25°C for the given solutions, we will follow these steps:

### Step 1: Calculate `H3O^+` concentration for 0.02 N HCl solution
1. **Identify the nature of HCl**: HCl is a strong acid, which means it completely dissociates in water.
2. **Dissociation of HCl**:
\[ \text{HCl} \rightarrow \text{H}^+ + \text{Cl}^- \]
...