What will be the direction of movement of water , when solution X having water potential of 12 - bars and another solution Z to -8 bars is separated by a semipermeable membrane ?

Options

A. Z to X
B. X to Z
C. Both direction
D. There will be no movement

Answer

To determine the direction of water movement between two solutions separated by a semipermeable membrane, we need to analyze the water potential of each solution.

### Step-by-Step Solution:

1. **Identify Water Potentials**:
- Solution X has a water potential (Ψ) of -12 bars.
- Solution Z has a water potential (Ψ) of -8 bars.

2. **Understand Water Potential**:
- Water potential is a measure of the potential energy in water, and it influences the direction of water movement. Water moves from areas of higher water potential (less negative) to areas of lower water potential (more negative).

3. **Compare Water Potentials**:
- In this case, -8 bars (solution Z) is higher than -12 bars (solution X) because -8 is closer to zero. Therefore, solution Z has a higher water potential compared to solution X.

4. **Determine Direction of Water Movement**:
- Since water moves from higher water potential to lower water potential, water will move from solution Z (Ψ = -8 bars) to solution X (Ψ = -12 bars).

5. **Conclusion**:
- The direction of water movement will be from solution Z to solution X.

### Final Answer:
Water will move from solution Z to solution X.