Osmosis In Tomatos Essay, Research Paper

This graph shown above gives the line of best tantrum for the per centum alteration in mass of the murphy french friess over the class of the 30 minute experiment. The graph is a curve that slopes downwards and does non travel through the beginning. Because the line is non consecutive and does non go through through the beginning, it means that the per centum addition and loss in mass and concentration are non straight relative. However, there is a form on my graph, and this is, as the concentration of the solution additions, the per centum alteration in mass lessenings. The graph shows that the per centum addition and loss in inversely relative to the concentration. The gradient does alter in my graph. It gets less steep as X axis gets bigger. This is because the murphy bit is going every bit flaccid as it perchance can, and so the alteration in mass of each molar concentration is going closer and closer together. From the line of best tantrum that has been added in, it can be seen that all of my points were really close to making a absolutely smooth curve. This shows that my consequences are reasonably dependable. My graph tantrums in with my anticipation of the experiment graph.

It shows that the murphy cells addition in mass in solutions with a high H2O concentration and lessening in mass in solutions with a low H2O concentration. When the concentration reaches above 0.75 M, there appears to be no farther H2O loss, proposing that the cell is to the full plasmolysed. From the graph an estimation to the concentration of the murphy cell can be made as 0.13 M, as this is the point where the murphy is non increasing or diminishing in mass, this is known as the isosmotic point. This is where no osmosis is taking topographic point, both the murphy and the solution have an indistinguishable grinder concentration. The following point, 0.25 M Looss about 4.0 % . This shows that the H2O potency of the salt solution in the beaker is weaker than that of the murphy bit. The following, 0.50 M, looses about 8.0 % in mass. This shows that the salt solution has an even weaker H2O potency than 0.25 M and that osmosis took topographic point. This is why the murphy lost even more mass, and it shows that the H2O potency in the beaker is less than that of the murphy bit. This form carries on through the graph, and even more mass is lost, as more H2O moves out of the murphy into the solution. My consequences besides match with my initial anticipations.

This graph of the alteration in mass helps turn out the point of complete plasmolysis, whereby the murphy can non spread out and take in any more H2O. As you can see as the molar concentration increases the alteration in mass lessenings. From right to go forth the first two points on the graph are really dispersed out bespeaking T

hat there was a big alteration in the mass. This decreases throughout the increasing molar concentration until the alteration is minuscular ( about 0.02g ) .

This graph above shows a clear indicant that there was an overall lessening in mass during the experiment. At the point 0.00 M the line for after the experiment is above the line for before the experiment unlike any of the others. This is because the H2O potency of the sugar solution is higher than that of the murphy bit.

Skill Area E: Evaluation

The experiment was really successful in my sentiment. I obtained a big measure of really accurate consequences from which I was able to make enlightening graphs. I think I took easy adequate consequences for the sum of concentrations that I was utilizing, and the clip that I used for the experiment to last was plenty to let sufficient osmosis to happen. However if I was to reiterate the experiment I might good increase the clip of the consequence to let more osmosis to go on and perchance happen out the impregnation point of the french friess. The scope of concentrations was equal but I would perchance make more concentrations if I repeated the experiment so that I would hold more varied consequences, i.e. 0.10m, 1.15m, 1.20m, and so on. This manner would hold allowed me to besides happen out the isosmotic point far more accurately as the 1 that I estimated is really approximative.

The film editing of the murphies was the most hard portion of the experiment as although I was entering my consequences by mass, it could good hold affected the surface country and so the overall rate of osmosis. If I were to reiterate the experiment I would hold perchance found a machine to cut the murphy as it would guarantee that all murphies would be the same weight and dimensions. Equally good as the murphy I could hold found a more accurate manner to mensurate out the solutions and to find the molar concentrations. Possibly I could hold used a burette. This would guarantee that I have an accurate sum of fluid in each trial tubing. I could besides weigh each bit on a more accurate graduated table, e.g. non to 0.00g but to 0.0000g.

There were non any out of the ordinary consequences, but some were non every bit near to the line as others. This may hold been caused by homo. When the murphy french friess were removed from the trial tubing and dried I may good hold dried some murphies more exhaustively than others and so some would hold more extra H2O, which would add to the mass. If the experiment was repeated I could happen another manner to dry the murphies that would guarantee that all were dried in the same manner for the same clip. However with all this said I think that the experiment was genuinely successful and I was really pleased with the complete comparing of my consequences with my initial anticipation.