Osmosis Lab

By: John Gliarmis


In this experiment, you are watching and testing the different changes in water. The purpose is the movement of water and what has occurred. This is osmosis. The dependent variable is the mass of the water. The independent variable is the clear soda, the original soda, the drinking water, and the distilled water. The control variables are the amount of water, the beaker, cups, and the amount of solutes.


Depending if the tubes or water sit in three different solution, the mass wold decrease.

Steps to Lab

1. Get 3 cups, put 200 mL of drinking water in 1 cup. Put 200 mL of original soda in 1 cup. Put another 200 mL of clear soda in the other cup.

2. Get the clear tubes out of dialysis and get them open.

3. Pour 30 mL of distilled water in all of the plastic tubes and tie them with a piece of string.

4. Measure the weight of the tubes, write the weight down, then place the tubes in the filled cups.

5. Leave not touched for 24 hours.

6. The next day, measure, record, and write down the changes in them.


Day 1:

Drinking water-17.23

Original soda-14.7

Clear soda-12.5

Day 2:

Drinking water-17-4

Original soda-13-1

Clear soda-12.1

Analysis & Conclusion

What happened during your lab?

During our lab, the osmosis is being observed. A tube will be filled with water. The mass would be analysed and recorded before using other lipids. The experiment would sit for 24 hours. The experiment will be weighed again and the change of mass will be determined.

The hypothesis was, if the tube of water sat in three different solutions, the mass would decrease. This hypothesis was only half correct for the clear soda. The hypothesis for the original soda was also half correct. The drinking water mass increased.