The pH of neutral water is 6.5 , then the temperature of water is

Options

A. is `25^@C`
B. is more than `25^@C`
C. is less than `25^@`C
D. can be more or less than `25^@C`

Explanation

To determine the temperature of water when the pH of neutral water is given as 6.5, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding pH and Neutral Water**:
- The pH of pure water at 25°C (298 K) is typically 7. This is considered neutral pH.

2. **Given Information**:
- The problem states that the pH of neutral water is 6.5. This indicates that the water is not at the standard temperature of 25°C.

3. **Relationship Between pH and Temperature**:
- The pH of water is affected by temperature. As the temperature increases, the dissociation of water increases, leading to a higher concentration of H⁺ ions. This results in a lower pH value for neutral water.

4. **Conclusion About Temperature**:
- Since the pH of neutral water is 6.5 (which is lower than 7), it implies that the temperature of the water must be higher than 25°C (298 K). This is because at higher temperatures, the neutral pH of water decreases.

5. **Final Answer**:
- Therefore, the temperature of water must be more than 25°C.