A solution has `pOH` equal to `13` at `298 K`. The solution will be

Options

A. Highly acidic
B. Highly basic
C. Moderatly basic
D. Unpredictable

Explanation

To determine the nature of a solution with a given pOH of 13 at 298 K, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Relationship between pH and pOH**:
The relationship between pH and pOH at 298 K (25 °C) is given by the equation:
\[ \text{pH} + \text{pOH} = 14 \]

2. **Substitute the Given pOH Value**:
We know the pOH is 13. We can substitute this value into the equation:
\[ \text{pH} + 13 = 14 \]

3. **Solve for pH**:
To find the pH, we rearrange the equation:
\[ \text{pH} = 14 - 13 \]
\[ \text{pH} = 1 \]

4. **Determine the Nature of the Solution**:
A pH of 1 indicates that the solution is highly acidic. The pH scale ranges from 0 to 14, where values less than 7 indicate acidity. Since 1 is much lower than 7, we conclude that the solution is highly acidic.

### Conclusion:
Thus, the solution with a pOH of 13 at 298 K is highly acidic.

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