Lab 2: Diffusion, osmosis and ose (1 point): solubility ections: 1. Fill a plastic cup with distilled (D) water to within 2cm of the top. 2. using a glucose test strip, test your cup for the presence of glucose. Is there glucose present? (yes or no). a. If glucose is present, empty out your cup. Wash the cup and start again from step 1. 3. Add 10-15 drops of Lugol's solution to plastic cup. THIS MuST BE coMPLETED IN THE HooD WEARING GLOVES. membrane. Tie a knot on 4. obtain a piece of dialysis tubing of 10cm. This will be used as your one end of the membrane. into the membrane. wmHANEwPlPETTE, 5. Using a transfer pipette, add 2-3mL of 2% starch other end. add the same volume of 20% glucose into the membrane Tie a knot on the is a leak, you 6. Gently invert your membrane a few times to ensure its contents are mixed. 7. Check if your membrane is leaking by gently squeezing your membrane. If there need to strengthen your knot. initial volume of 8. Place membrane into cup. Mark the level of the 9. Note the initial volume of liquid in the membrane. water in your cup. minutes. 10. Allow membrane to sit for 30 1. Why are we using Lugol solution? What does Lugol's solution test for? (2 points). solutinsid the tube with starch want to act on