A semipermeable membrane used in the measurement of osmotic pressure of a solution allows the passage of

Options

A. solute molecular through it
B. solvent molecules though it
C. both solvent and solute molecules
D. either solvent or solute

Answer

To solve the question regarding what a semipermeable membrane allows to pass in the measurement of osmotic pressure, we can follow these steps:

### Step 1: Understand the Concept of Osmosis
Osmosis is the movement of solvent molecules through a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration.

**Hint:** Recall that osmosis is specifically about the movement of solvent, not solute.

### Step 2: Define Semipermeable Membrane
A semipermeable membrane is a barrier that allows certain molecules to pass through while blocking others. In the context of osmosis, it typically allows the passage of solvent molecules (like water) but not solute molecules (like salts or sugars).

**Hint:** Think about what types of molecules are typically small enough to pass through a membrane.

### Step 3: Identify What Passes Through the Membrane
In the measurement of osmotic pressure, the semipermeable membrane will permit only the solvent molecules to move across it. This means that the solute molecules cannot pass through the membrane.

**Hint:** Focus on the distinction between solvent and solute in a solution.

### Step 4: Conclusion
Based on the understanding of osmosis and the properties of a semipermeable membrane, we conclude that the correct answer to the question is that the membrane allows the passage of solvent molecules.

**Final Answer:** The semipermeable membrane allows the passage of solvent molecules.

### Summary of Steps:
1. Understand osmosis.
2. Define semipermeable membrane.
3. Identify what passes through the membrane.
4. Conclude with the correct answer.