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

Question

(4 points)
Responses

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

The concentration of starch in the dialysis bag will increase.

Answer 1

To make accurate predictions based on the observations provided, we need to consider the process typically involved in such experiments, particularly those related to diffusion and osmosis through a dialysis bag.

1. The mass of the dialysis bag will increase. - This indicates that some solute (likely water in this case) has moved into the dialysis bag, resulting in an increase in mass.

2. The solution in the beaker will turn blue-black. - This suggests that there is a starch indicator present (like iodine) that reacts with starch. If starch is present in the dialysis bag and it diffuses out, it could cause a color change in the solution.

Thus, the two observations that most accurately predict what will occur in the investigation are:

• The mass of the dialysis bag will increase.
• The solution in the beaker will turn blue-black.