Osmosis Challenge

Osmosis Challenge

Is a 1M NaCl, 1M sucrose and 1M glucose solution isotonic?

Open Ended

How are a 1M NaCl, 1M sucrose and 1M glucose solution different?

Open Ended

Can you rank the solutions from the most hypertonic to the most hypotonic?

Poll

1. The sodium chloride solution on Side X will become more concentrated and that on Side Y less concentrated because a substance tends to diffuse from regions of lower concentration to regions of higher concentration of that substance.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.

Poll

2. The concentrations of the glucose solutions on Sides X & Y will remain unchanged because the membrane is impermeable to glucose and so glucose cannot diffuse from one side to the other.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.

Poll

3. The concentration of sodium chloride on Side X will eventually equal that on

Side Y because sodium and chloride ions will move by diffusion from one side to the other, gradually reaching a uniform density, and then the net movement of ions will stop.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.

Poll

4. The concentrations of glucose on Side X will decrease and that on Side Y

increase because water molecules will diffuse through the membrane from Side Y to Side X by osmosis, thus lowering the glucose concentration on Side X.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.

Poll

5. The fluid level will increase on Side Y and decrease on Side X because water

molecules will move through the membrane from regions of higher to regions of lower concentration of water molecules.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.

Poll

6. The fluid level on Side X will rise because the water molecules on that side at the beginning of the experiment have more free energy than those on Side Y.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.

Poll

7. The net movement of water molecules will be from Side X to Side Y because

water molecules will move from the solution with the lower solute potential to the solution with the higher solute potential when the two are separated by a selectively permeable membrane.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.

Poll

8. Water molecule will move only from Side Y to Side X and not from Side X to

Side Y because water molecules move only from regions of higher to regions of lower concentration.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.

Poll

9. The fluid on Side X will rise because the solution in Side X had lower solute

potential than the solution in Side Y.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.

Poll

10. Water molecules will tend to move from Side Y to Side X because the net movement of water molecules will be from the solution with the lower solute concentration to the solution with the higher osmotic concentration.

• a. Both the statement and the reason are correct.

• b. The statement is correct, but the reason is incorrect.

• c. The statement is incorrect, but the reason is a fact or a principle.

• d. Both the statement and the reason are incorrect.