I am doing a lab on Dialysis to check if starch moves through the differentially permeable membrane of dialysis tubing.We did this by placing a dialysis tube filled with starch solution into a beaker filled with distilled water and a few drops of iodine.

I concluded that starch does not move through the dialysis tubing.

Could you help me with this question:
Describe the solution in the dialysis tube as hypotonic, hypertonic or isotonic with respect to the the distilled water in the beaker.

To determine whether the solution in the dialysis tube is hypotonic, hypertonic, or isotonic with respect to the distilled water in the beaker, you need to understand the concept of osmosis and how it affects the movement of water across a differentially permeable membrane.

In this experiment, you placed a dialysis tube filled with starch solution into a beaker filled with distilled water. The dialysis tubing acts as a differentially permeable membrane, allowing the passage of water molecules but not larger molecules like starch. The iodine was added to help visualize the presence or absence of starch.

Hypotonic, hypertonic, and isotonic solutions are relative terms used to compare the concentration of solutes on either side of a membrane. Here's what these terms mean:

- Hypotonic solution: A hypotonic solution has a lower solute concentration compared to the solution on the other side of the membrane. In this case, if the starch solution inside the dialysis tube has a lower solute concentration than the distilled water in the beaker, it would be considered hypotonic. This would mean that there are fewer solute particles in the dialysis tube solution than in the surrounding water.

- Hypertonic solution: A hypertonic solution has a higher solute concentration compared to the solution on the other side of the membrane. If the starch solution inside the dialysis tube has a higher solute concentration than the distilled water in the beaker, it would be considered hypertonic. This would mean that there are more solute particles in the dialysis tube solution than in the surrounding water.

- Isotonic solution: An isotonic solution has an equal solute concentration compared to the solution on the other side of the membrane. If the solute concentration in the starch solution inside the dialysis tube is the same as the distilled water in the beaker, it would be considered isotonic. This would mean that the solute concentration is equal on both sides of the membrane.

To determine which term describes the solution inside the dialysis tube, you need to consider the movement of water molecules. If the starch solution inside the dialysis tube remained the same after some time and there was no observable change in the color of the iodine, it implies that there was no movement of starch out of the dialysis tube. Consequently, the solution inside the dialysis tube can be described as isotonic with respect to the distilled water in the beaker.

To further support your conclusion, you could perform additional experiments with different concentrations of solutes in the dialysis tube solution or differentially permeable membranes to explore the effect of concentration gradients on osmosis.