At 298 K , the value of `K_w ` is ………………

Explanation

To find the value of \( K_w \) (the ionic product of water) at 298 K (25 °C), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of \( K_w \)**:
- \( K_w \) is defined as the product of the concentrations of hydrogen ions \([H^+]\) and hydroxide ions \([OH^-]\) in water at a given temperature.
- Mathematically, it is expressed as:
\[
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