7. Add droppers of iodine solution (IKI) to the water in the beaker until an amber (tea-like) color is apparent 8. Recor
Posted: Wed Jul 06, 2022 10:21 am
7. Add droppers of iodine solution (IKI) to the water in the beaker until an amber (tea-like) color is apparent 8. Record the color of the solution in the beaker in Table 2 9. Place the bag in the beaker with the open end hanging over the edge. Secure the open end of the bag to the beaker with a rubber band as shown in Figure 2. Make sure the contents do not spill into the beaker. Wait 5 minutes 10. You will note a color change. Record the color of the bag contents in Table 2 11. Mark off a test tube at 1 cm and 3 cm. 12. Using a pipette, draw solution from near the bag and at the bottom of the beaker for testing with Benedict's reagent. Fill the test tube to the first mark (1cm) with this solution. Add Benedict's reagent to the 3 cm mark. Heat in boiling water for 5-10 minutes, observe any color change, and record your results as positive or negative in Table 2. 13. Remove the dialysis bag from the beaker and dispose of it as directed by your instructor. Beaker rubber band dalys membrane STASH plasma . Fig. 2 Table 2: Diffusion Across the Plasma Membrane At the start of Experiment Bag yang) closed end of dalysis tog Contents Color Glucose/ Starch Water/ lodine open end of dala waand PIodine solution glucose and At the end of Experiment Color Benedict's Test (+) or (-) Conclusions Conclusions Based on the color change noted in the bag, conclude what solute diffused across the dialysis membrane from the beaker to the bag and record your conclusions in in Table 2 . From the results of the Benedict's test on the beaker contents, conclude what solute diffused across the dialysis membrane from the bag to the beaker and record your conclusions in Table 2 Which solute did not diffuse dialysis membrane from the bag to the beaker? • Explain how you know this