Which two observations most accurately predict what will occur in the investigation?

Question

(4 points)
Responses

The solution in the dialysis bag will turn blue-black.
The solution in the dialysis bag will turn blue-black.

The solution in the beaker will turn blue-black.
The solution in the beaker will turn blue-black.

The mass of the dialysis bag will increase.
The mass of the dialysis bag will increase.

The mass of the dialysis bag will decrease.
The mass of the dialysis bag will decrease.

The concentration of starch in the dialysis bag will increase.

Answer 1

To accurately predict what will occur in the investigation, we need to consider the context provided by the terms "dialysis bag," "beaker," "blue-black" color change, and mass changes. Here are two observations that would most likely be accurate:

1. The solution in the dialysis bag will turn blue-black. - This indicates that starch, if present in the dialysis bag, will react with iodine (if iodine is in the beaker) and turn blue-black.

2. The mass of the dialysis bag will increase. - This implies that water (or other small molecules) will move into the dialysis bag by osmosis if the concentration of solutes is higher inside the bag compared to the beaker.

These observations reflect the expected results of diffusion and osmosis occurring in an experiment involving a dialysis setup, where larger molecules (like starch) cannot pass through the dialysis membrane, but smaller soluble molecules (like iodine) can.

Answer 2

The models below are set up to represent how a cell responds to imbalances in solute concentration. Match the correct arrow set to the appropriate beaker to show how water will move into or out of the cell in each beaker for the solute conditions shown.(9 points)

Answer 3

To correctly match the arrow sets indicating how water will move relative to cells in different solute conditions, we will follow the principle of osmosis. Here’s how to interpret the typical scenarios:

1. Hypotonic Solution (Lower Solute Concentration Outside the Cell): Water moves into the cell because the concentration of solute is lower outside, causing the cell to swell. In this case, the arrows should point into the cell.

2. Isotonic Solution (Equal Solute Concentration Inside and Outside the Cell): There is no net movement of water, so arrows can be depicted as balanced or showing equal arrows going in and out of the cell.

3. Hypertonic Solution (Higher Solute Concentration Outside the Cell): Water moves out of the cell into the surrounding solution because the concentration of solute is higher outside, causing the cell to shrink. In this case, the arrows should point out of the cell.

To provide you with the exact arrow set you should use for each beaker, I would need to see the models or beaker scenarios you are referring to. However, following the rules mentioned above will guide you in determining the correct arrows based on the solute concentration relative to the cell's internal environment. If you can describe the conditions in each beaker, I can give more specific guidance on which arrow sets to match!