Healthcare

My prediction is that as the concentration increases, the potato cell will lose more weight. This is because of the osmosis of water particles from the potato cell cytoplasm to the solution, resulting in a loss of weight. As the concentration decreases, the potato will lose less weight until a certain point where the osmosis of particles in and out of the potato cells will be equal. I also predict that as the salt

As the Concentration of the Sucrose Solution decreases, the more the potato’s mass increases. This is due to the solution being hypertonic. So, as the solute concentration gets lower, the potato’s water concentration will get higher, therefore more water particles from the solution will absorbed by the potato. Some changed very little in mass because the concentrations of the H2O molecules in the potato and outside the potato were equal. This equality in concentration is called Isotonic.

During the experiment, it was found that as the concentration of sucrose increases, the final mass of the carrot cores decreases until, in the cases of .6M solutions and .9M solutions, mass is actually lost during the 24 hours. This is likely due to the fact that there was a higher concentration of water inside the carrot cores than there was inside the sucrose solution. So the water was diffusing from a high concentration in the carrot to the low concentration in the sucrose solution and causing a decrease in overall mass. It can also be assumed by the relative linear decrease in mass, that there was similar change between each of the different concentrations which is good because it validates that the data that was collected was relatively accurate.

Prediction I predict that the less concentrated the solution of sucrose is, the greater the weight of the potato will be. I predict this because osmosis is the movement of water from a region of high water concentration to a region of low water concentration through a semi-permeable membrane i.e. the cell wall of the potato. If the concentration of water inside the potato is high then the

Either the solution is hypotonic which means that the solution has a lower concentration than the potato core and this would cause water to flow into the potato and make it larger and therefore increase its mass. The state the cell is in is called turgid.

Though the theory following the hypothesis is correct and the experiment was carried out with as much attention as possible in a high school laboratory, the results obtained were still indicative of a few errors and did not support the predicted hypothesis. From the results obtained it can be concluded that as the concentration of sucrose increases the average percentage change in mass decreases. This is because the salt concentration inside the potato cubes of 10%, 15% and 20% concentration is less that in the salt concentration on the sucrose solution, thus the three cubes submerged in the 10% - 20% concentrated solution lost mass (hypertonic). However the cube submerged

I think that the potatoes with no change will be in an isotonic solution, the potatoes in a hypertonic solution will shrink, and the

The relative osmotic concentration was determined by measuring the percent change in mass of the potato tissues. Change in mass was measured of six solutions, each containing different levels of concentration (0, 0.1, 0.2, 0.3, 0.4, and 0.5). The percent change in mass decreased as sucrose concentration increased, therefore, relative osmotic concentration also decreased as sucrose concentration increased. However, the osmotic concentration of 0.2 M sucrose solution was relatively greater than that of 0.1 M sucrose solution. In sucrose concentration 0.5 M, the osmotic concentration decreased slightly from that of 0.4, but significantly from those of all other sucrose concentrations. The osmotic concentrations were greater than

Van’t Hoff’s Law suggests that the osmotic potential of a cell is proportional to the concentration of solute particles in a solution. The purpose of this experiment was to determine if there are any differences between the osmolalities, the no-weight-changes of osmolalities, and the water potentials of potato cores in different solutions of different solutes. The percent weight change of the potato cores was calculated through a “change in weight” method. The potato core’s weight was measured before and after they were put into different concentrations of a solute for 1.5 hours. In our experiment, there were no significant differences from the osmotic potentials of our results and the osmotic potentials of other scientists work. Ending with chi square values of 2.17 and 2.71, and p values of 0.256 and 0.337, concluding that there is no difference in water potentials of potato cores in different solutions of different solutes at varying concentrations.

In conclusion, the potato cube with the highest surface area to volume ratio (the 1x1x1 cube) had the fastest rate of diffusion as it had the largest percentage increase in mass. While all the other cubes of potato had larger increases in mass at face value compared to the smallest cube, the smallest cube had the largest overall gain in percentage. The results support my hypothesis that the smallest cube will have a higher rate of osmosis because it has a proportionally larger amount of surface area compared to its volume.

You can see the slight decrease in size of the potato and the skin became slightly wrinkled. Glass E: in beaker E 40 grams of salt was added. The potato floated to the top . In the first hour the potato lost 2 grams, in the second hour it stayed the same and in the third hour it lost 3 grams. This means the potato lost a lot more water then the others.

However, there is not going to be net movement of water entering or exiting the cell. Hypothesis: Based on this experiement: estatimating the osmolarity of potato tissues by immersring potato rectangles: I may weight my thoughts and knowledge over on that concentrated sucrose solution will in some way cause the mass of the potato itself, then decrease as water is more likely to move out of the cells. However, low concentrations of sucrose solutions will effect, however, the mass of the potato rectangle will in some way increase because the water is going to move into the plant cells. Independent variable:

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In conclusion when the molarity level was at 0 and at .2 the potatoes had gained mass so therefore they were placed in a hypotonic environments. When the molarity level was .4 and above the potatoes loss mass so therefore they were placed in hypertonic environments. So the different in concentrations does change the mass of the potatoes because they determine the osmosis environments.

This would happen by using similar sizes and lengths of potato cylinders and applying the into different concentrations of sucrose (0,10%,30%, 50%, 70%) in foam cups then measuring the change in mass of the potato cylinders afterwards. Maintaining all variables unchanged such as pH, same size, covered solutions, and a constant temperature. The time taken for all potato cylinders will be 24 hours.