Answer: Answer is bag C
Step-by-step explanation:
Answer is Bag C. Dialysis is a technique of separating molecules by difference in their rate of diffusion through semipermiable membrane,Diffusion is the random thermal movement of the molecules in the solution that leads to the net movement of the molecules from an area of higher concentration to a lower concentration until equilibrium is reached.In contrast, osmosis is the movement of solvent particles across a semipermeable membrane from a dilute solution into concentration solution.If a bag containing water is placed in a beaker of water , then there is no concentration gradient and thus water movement will be negligible. Therefore, there will be minimum change in the weight of the bag.