Today D block saw the basics of osmosis and diffusion in action as they helped with a demonstration of lab 1A.This cool guy is adding 4mL of IKI to 170mL of distilled water. On the table are glucose test strips which are used to measure the amount of glucose present in solution.
What did we learn today:
1. Molecules move from areas of high concentration to low concentration (down a concentration gradient).
2. Dialysis tubing functions as a semipermeable membrane through which water, glucose and IKI are able to pass through.
3. Starch is a macromolecule, and therefore too large to pass through the membrane, so it stays in the bag.
Homework for both classes:
1. Complete the analysis questions for lab 1A.
2. Read the background and procedure for lab 1B
3. Bring your lab manual to class on Friday.
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