Glucose leaves the bag. You know this because you get a positive test for glucose in the water surrounding the dialysis tubing. Iodine enters the bag.
Water enters the bag.
You know this because the bag appears to contain more fluid after the dialysis tubing has been sitting in the water. All of the substances that moved either into or out of the bag did so because the concentration of that substance was greater in one place than in the other. In all instances the molecule that moved was smaller than the pores in the dialysis tubing. Starch did not move out of the bag because the starch molecules are larger than the pores in the dialysis tubing. The bags could have been massed before and after the waiting time and the difference noted.