Cell Transportation Lab
By: Apoorva Mutyala
In this lab the process of osmosis was explained visually. The lab was incubated overnight for the most efficient results. The evidence of osmosis was shown by the change of weight
-in grams- of our tested item. This experiment was used to show the process of osmosis in a visual format.
Osmosis is the movement of water in a semi-permeable environment. The purpose if this was to prove the theory of osmosis. The dependent variable is the mass of the tubes. The independent are the solutions. The controls and constants are, the amount of water in the tubes, the size of the cups, the amount of solution, and the types of tubes. The results are as reported below.
- If the soda has more sweetener, then more water molecules will exit the tube.
- If the distilled water has fewer solutes, then more water molecules will enter the tube.
- 3 dialysis tubes
- 3 cups
- A funnel
- A graduated cylinder
- 200 mL of 3 different solutions
- A balance
- 20 mL of drinking water
- Gather your materials
- Tie one end of the dialysis tube tightly with the string
- Place funnel at the opposite end of the tied section
- Pour 20 mL of drinking water into the tube.
- Repeat step 2 on the other end of the tube
- Repeat steps 2-5 on the other 2 dialysis tubes
- Measure and record the mass of each dialysis tube
- Pour 200 mL of each solution into different cups
- Place a dialysis tube into each cup
- Wait 24 hours
- Remove dialysis tubes from cups and record mass
- Record data and create conclusion
Regular Soda Tube - (before) 18.8 g; (after) 13.8 g
Diet Soda Tube - (before) 17.4 g; (after) 15.4 g