The water potential of pure water changes when solute is added to it.

Explanation

### Step-by-Step Solution:

1. **Understanding Water Potential**: Water potential is defined as the potential energy of water per unit volume. It is a measure of the tendency of water to move from one area to another and is influenced by solute concentration and pressure.

2. **Water Potential of Pure Water**: The water potential of pure water is considered to be 0 MPa (megapascals) because it has no solute concentration. This is the reference point for measuring the water potential of solutions.

3. **Adding Solute to Water**: When a solute is added to pure water, it increases the solute concentration in the solution. This addition of solute affects the water potential.

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