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Lab 6 Diffusion

Topics: Diffusion, Molecular diffusion, Starch / Pages: 2 (325 words) / Published: Sep 15th, 2013
Bio Lab
Lab 6 Corn Syrup Aloe Vera Gel
Time Blue Dye Red Dye Blue Dye Red Dye
10 sec 1 cm 1cm 1cm 1cm
20 sec 2cm 2cm 1.5cm 2cm
30 sec 2cm 1cm 1.5cm 2.5cm
40 sec 2cm .5cm 1.5cm 2.5cm
50 sec N/C .5cm N/C N/C

Molecular Weight Distance Traveled Speed of Diffusion
Blue Dye 793g 20.00mm 600mm/hr
Red Dye 496g 45.00mm 1350mm/hr

Aloe Vera Gel

Molecular Weight Distance Traveled Speed of Diffusion
Blue Dye 793g 15mm 450mm/hr
Red Dye 496g 25mm 750mm/hr

1. The red dye diffused faster in both materials.

2. Yes, since the red dye is lighter it diffuses faster.

3. The rate of diffusion does change after time. The longer the dye sits the less it spreads in the liquid.

4. Cells must stay at a distance that is equal to theis diffusion. If they are farther away or closer than they should be they would not be able to perfom their necessary finctions.

5. The thicker or thinner the medium is affects the rate of diffusion because the thinner the medium the quicker the dye diffuses. The thicker it is the longer it takes for the dye to diffuse. This affects nutrient transport because it can be delayed or expedited based on how thick the fluid is.

Experiment 2

1. Iodine seeped into the bag causing it to turn purple.

2. The starch

3. No

4. The contains more starch. The beaker contains more glucose.

5. The beaker was more hypotonic in regards to the IKI solution while the baggie was more hypotonic in regards to the starch.

6. The iodine would seep out of the bag and turn the beaker solution purple.

8. The dialysis tubing represents a cell membrane.

9. Glucose will only continue to diffuse until there are equal amounts in the bag as well as in the beaker.

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