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LAB ONE Diffusion and Osmosis. PART A BEFORE: In the beaker = iodine (Lugol’s solution) In the bag = starch + glucose AFTER 30 MINUTES: see picture below.

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Presentation on theme: "LAB ONE Diffusion and Osmosis. PART A BEFORE: In the beaker = iodine (Lugol’s solution) In the bag = starch + glucose AFTER 30 MINUTES: see picture below."— Presentation transcript:

1 LAB ONE Diffusion and Osmosis

2 PART A BEFORE: In the beaker = iodine (Lugol’s solution) In the bag = starch + glucose AFTER 30 MINUTES: see picture below In and out of bag Glucose found in and out of bag Starch stayed in the bag

3 Table 1.1 p. 2 Initial Contents Solution Color InitialFinalInitialFinal Bag15%glucose +1% starch clearBlue-black++ BeakerWater and iodine Straw yellow -+ Presence of Glucose

4 Part B distilled 0.6M 0.8M1.0M 6 dialysis tubes were filled, each with a different concentration of sucrose from 0.2 M to 1.0 M They were placed in cups of distilled water. Wait 30 minutes. Mass the bags.

5 Part B Table 1.2 Copy the data from your lab mates. Table 1.3 You need to copy the group data from your period. It is posted on the chalkboard above the hood by the turtle tank. You will then calculate the class average.

6 GRAPH 1.1 Graph on the X-axis: the concentrations of sucrose Graph on the Y-axis: the class average % difference (see chart above)

7 Part C: Potato Cores Mass two potato cores and place in different sucrose solutions from 0.2 M to 1 M.

8 Example of Group Percent Change in Mass p. 11 Class Average Table 1.3b: Water Potential of Potato Cores (Class Data) Sucrose Concentration (M)Percent Change in Mass

9 Graph 1.2 Molarity is where the line crosses the O line


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