Osmosis in potato cells.

Prediction

I predict that the potato in the 0% Solution

will become larger than before it was put in it. The potato in the 10% solution will become smaller than it was before because Osmosis goes from a weak to a strong solution. I predict that this will also happen to the other ones I test.

Apparatus

5 boiling tubes

Stop clock

Scalpel

Potato

Potato Borer

White tile

0%, 2%, 4%, 6%, 10% solutions

Boiling tube rack

Balance

Kitchen towel

Measuring cylinder

Diagram

Method

First of all I collected all the equipment stated in the apparatus and then set it up as shown in the diagram. I cut 5 pieces of potato in to cylinders using the potato borer and then put the pieces of potato on to the white tile and cut them all level. I then dried the potato with the kitchen towel and took them to the balance to weigh them and wrote it down for all of them (do not get them mixed up) take note of which balance you used for later. Label the test tubes with the solutions that are going to be used. I collected the solutions 0%, 2%, 4% and 10% but I could not get 6%, so I mixed 10ml of 2% and 10ml of 4% solution in the cylinder to make 6%. I then put that in to the boiling tube marked with 6% and repeated this for all of the solutions making Shaw I put them in the write boiling tube. Then take

Note of which piece of potato that you put in. put them all in within a couple of seconds and start the stop clock and leave it running for 15 minutes. While this time is counting down tidy up the other apparatus and put them away. When the time is up take out the potato pieces by putting your thumb over the end of he boiling tube only letting the solution come out and keeping the potato inside it. Do this for all of them. Then let the potato drop out on to some kitchen towel. Role them to dry off the outer layer but don't squash it to hard or you will ruin the results then go back to the same balance that you used before and write down the results making Shaw you don't get the weight mixed up. And put the rest of the apparatus away.

Results

Conclusion

From this experiment I found out that it did what my prediction said and that osmosis does travel from a weak to strong solution

Evaluation

Over all I think that the experiment went well. One of my results was out but I think that I just got the solutions label the wrong way or mixed them up wrong.