The chip in the stronger solution will loose water molecules because of osmosis.
The chip in the stronger solution will loose water molecules because as the sucrose has large particles its harder for them to fit through the membrane of the cells, so water is lost and not gained.
The chip in distilled water will gain water molecules because there are more water molecules and no sucrose solution. This makes the solution thinner so osmoses happens more.
Osmosis is a special case of diffusion that involves water. Basically it is the movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low water concentration. This means that only water molecules can pass through the partially permeable membrane due to it being small enough to fit through. Bigger molecules such as glucose would not be able to get through. Also Osmosis makes plant cells swell up.
Osmosis is important to plants because it only lets water pass through the semi permeable membrane. Water is vital to a plant because it helps it live and survive.
This information from this investigation will be important to Mr. Chip because it will help him decide how stronger solution he should put his chips in.
Obtaining Evidence: (Results)
Experiment 1
This is the first experiment that we did. As you can see 0.2 molar is the best solution to use because it has only gained 0.1 grams where the rest have lost or gained more.
I have dun the same experiment two times again, this will help me prove that I am doing a fair test and that the results will be nearly the same.
Experiment 2
As you can see the 0.2 molar has not lost or gained any weight.
Experiment 3
Again I can see that 0.2 molar has not lost any or gained any weight. I think that this proves that a weak solution of sucrose is the best formula.
The measuring instruments I used were a pipette, a measuring cylinder, electronic scales and a ruler to measuring the chips.
I measured and recorded 3 sets of results. I did not so many type s of results for the last set because I knew that the answer would be around the last part of the table. The trends I spotted were, the more sucrose the more water was lost and the less sucrose, more weight was put on. This is because of osmosis; the bigger sucrose particles can’t fit through the membrane, so more weight is lost. However because in the less sucrose tests, there is more water so the chip will retain it more. I had some odd results because the first experiment that we did had a larger starting mass than the other two where the starting masses were the same. This could have made a difference in results because more or less water could have been retained or lost. My investigation was a fair test because we only chose to differ one variable, which was the strength of the sugar solution. However, we did not choose the same weight of chip in each experiment. To make sure my results were reliable I needed to do the experiment more than once to see if my results were nearly the same or the same. To make sure my results were accurate I needed to use measuring equipment and the same dilutions of sucrose in each experiment.
Analysing
From my graph I can see that the correct solution to store the chips is a solution of 2.0. This is because the chip in that solution has not gained or lost any weight. I have proved this by having to sets of results the same. From my graph I can see that one trend is the more sucrose put in the solution the less weight it had when we measured the chips. This is because of osmosis and large particles can’t fit through the semi-permeable cell walls of the chip. The other trend is the less sucrose in the solution the more water the chips will hold because as the molecules are small, they can fit through the cell walls. I can explain these trends by using the rule of osmosis. My repeat results compare with my first set of results show that the results were nearly the identical, but because we used different masses of chip, there would be more difference in mass with the first experiment than the second. Nevertheless, the second and third results were the same apart from one solution. This could have been because the room temperature could have been different between the tow experiments. This supports my predictions because I knew what osmosis was and that smaller molecules fit through the membrane much more effectively.
Evaluating
My experiment was good because we measured out the solution as accurately as we could that made most of the results the very similar. Also because it proved my prediction on what would happen. My experiment was poor because we could have done all three investigations in the same temperature and the mass of the chips all could have been the same. My results were accurate because we used accurate measuring equipment they were also reliable because we did the experiment more than once so we could see if we were getting the right kind of results. I could improve my investigation having better measuring pipettes and cylinders, I also could time the investigations to make sure they all get the equal time and make sure that they are all in the same room temperature. I could extend my investigation by trying out more variables such as the temperature because osmosis could happen faster if it is warmer. Or the type of potato that Charles Chip could use.
