Questions: A 10% starch solution is separated from a 2% starch solution by a semipermeable membrane. Starch is a colloid. Which of the following is correct? The solutions have the same osmotic pressure. The solutions have opposite osmotic pressures. The 2% solution has the higher osmotic pressure. Neither solution has osmotic pressure. The 10% solution has the higher osmotic pressure.

A 10% starch solution is separated from a 2% starch solution by a semipermeable membrane. Starch is a colloid. Which of the following is correct?
The solutions have the same osmotic pressure.
The solutions have opposite osmotic pressures.
The 2% solution has the higher osmotic pressure.
Neither solution has osmotic pressure.
The 10% solution has the higher osmotic pressure.

Transcript text: A $10 \%$ starch solution is separated from a $2 \%$ starch solution by a semipermeable membrane. Starch is a colloid. Which of the following is correct? The solutions have the same osmotic pressure. The solutions have opposite osmotic pressures. The $2 \%$ solution has the higher osmotic pressure. Neither solution has osmotic pressure. The $10 \%$ solution has the higher osmotic pressure.

Solution

Solution Steps

Step 1: Understanding Osmotic Pressure

Osmotic pressure is the pressure required to stop the flow of solvent through a semipermeable membrane separating two solutions of different concentrations. It is directly proportional to the solute concentration.

Step 2: Analyzing the Given Solutions

We have a $10\%$ starch solution and a $2\%$ starch solution. Since starch is a colloid, it does not pass through the semipermeable membrane, but it affects the osmotic pressure.

Step 3: Comparing Osmotic Pressures

The osmotic pressure is higher in the solution with a higher solute concentration. Therefore, the $10\%$ starch solution will have a higher osmotic pressure compared to the $2\%$ starch solution.