0.5M sucrose solution develops a pressure of 15 bars in an osmometer, which of the following statement is wrong for such a solution?

Options

A. That its osmotic potential is -15 bars
B. That its water potential is -15 bars
C. That is pressure potential is -15 bars
D. That its osmotic pressure is +15bars

Answer

To solve the question regarding the 0.5M sucrose solution that develops a pressure of 15 bars in an osmometer, we need to analyze the statements provided and determine which one is incorrect.

### Step-by-Step Solution:

1. **Understanding Osmotic Potential**:
- Osmotic potential (also known as osmotic pressure) is the potential of water to move into a solution through osmosis. It is typically expressed in negative values for solutions.
- For a 0.5M sucrose solution, we can assume the osmotic potential is approximately -15 bars.

2. **Calculating Water Potential**:
- Water potential (Ψ) is the sum of osmotic potential (Ψs) and pressure potential (Ψp).
- In this case, if the osmotic potential is -15 bars and the pressure potential is 0 bars (since it is an osmometer), the water potential would be:
\[ Ψ = Ψs + Ψp = -15 \text{ bars} + 0 \text{ bars} = -15 \text{ bars} \]

3. **Understanding Pressure Potential**:
- Pressure potential is the physical pressure exerted by the liquid in the osmometer. Given that the osmometer is developing a pressure of 15 bars, it indicates that the pressure potential is +15 bars.

4. **Analyzing the Statements**:
- Now we analyze the statements:
- **Option A**: Osmotic potential is -15 bars. (This is correct)
- **Option B**: Water potential is -15 bars. (This is correct)
- **Option C**: Pressure potential is -15 bars. (This is incorrect; it should be +15 bars)
- **Option D**: Osmotic pressure is +15 bars. (This is correct)

5. **Conclusion**:
- The wrong statement among the options provided is **Option C**, which states that the pressure potential is -15 bars. The correct value for pressure potential is +15 bars.

### Final Answer:
The wrong statement for the 0.5M sucrose solution is **Option C**: "Pressure potential is -15 bars."