Osmosis is a kind of diffusion which only occurs with water. With osmosis, there is a membrane which does not allow dissolved material to pass though it but only water (selectively permeable) Osmosis is the movement of water molecules from a weak solution to a strong solution. Osmosis occurs when water is taken up e.g. Plants take up water from the ground. .
Conclusion .
The first observation I made was after the potato cylinders were placed in their solutions I noticed that the potato cylinders in the 0.0M and 0.2M solutions were floating and the ones in the 0.4M, 0.6M, 0.8M and 1.0M solutions were at the bottom of the test tube, this lead me to drawing my first conclusion. The graph (see attached) shows that the potato in the 0.0M solution and in the 0.2M is hypertonic, as I said in my prediction, this means that there is a higher water potential in the distilled water and 0.2M solution than in the potato, which has a high concentration of solutes. Therefore this is why the water diffuses by osmosis down the concentration gradient from high concentration to low concentration, resulting in the potato gaining mass. The opposite oc .
change in mass compared to their starting mass. To get around this problem we must process the results obtained rather than just working out the change in mass. To process the results further I found it best to process the results into a percentage change. .
(Ending Mass/Starting Mass) * 100 = Percentage after compared to start. .
((Ending Mass/Starting Mass) * 100) - 100 = Percentage Change. .
By processing the results into 'percentage change' and plotting a graph from this we can gain a clear fair picture of the results obtained. .
Results: .
A Table Showing the Raw Data Recorded from an Investigation into the Effect of Concentration on Osmosis in Potato. .
Concentration of Salt and Water Solution (%). .
Starting Mass (g) .
Ending Mass (g) .
0 .
15 .
17 .
20 .
15 .
16 .
40 .
12 .
11 .
60 .
11 .
12 .
80 .
17 .
15 .
Osmosis Plan An introduction to osmosis. ... Osmosis in humans The kidney is made up of a very large number of tubules. ... Osmosis in animals. ... Therefore osmosis occurs. ... Then I worked out whether the sac had gained or lost weight by osmosis. ...
Osmosis Aim: - To investigate the factors that effect the osmosis in potatoes. Introduction: - Osmosis is the movement of water through a semi permeable membrane, separating solutions of different concentrations. ... If you put a plant cell in water, water enters by Osmosis, then swells up. ... This will allow us to see whether osmosis has taken place, and to what extent. ... Preliminary Experiment: - In this preliminary experiment I will investigate the factors that affect the osmosis in potatoes. ...
Through this procedure, the results and the process helped to under what osmosis does in aiding the cell. ... The diffusion of water into and out of a selectively permeable membrane is called osmosis. ... Osmosis does not occur in an isotonic solution. ... After you record you record your data,that would conclude your osmosis lab. ... This graph maps the difference of a group and the class mass change during osmosis. ...
I am going to investigate how the concentration of a sucrose solution affects osmosis in potato cells. Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration. Hypothesis: Osmosis is defined as the net movement of water or any other solution's molecules from a region in which they are highly concentrated to a region in which they are less concentrated. ... Some other Factors that effect osmosis are the: Temperature Surface area Time spent in the solution The shape and size of the potato used ...
The function of the contractile vacuoles is to pump water out of the cell caused by osmosis. ... This process is known as osmosis because the higher concentration that surrounds the Paramecium is moving itself to the lower concentration inside the Paramecium. 4. According to the laws of osmosis the plant cells should have exploded. ...
Investigating Osmosis Prediction Osmosis is defined as the movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of low water concentration. ... The greater the concentration of water in the external solution the greater the amount of water that enters the cell by osmosis. ... At this point there will be no change in the length, volume and mass of the potato, as the net movement of water will be zero, no osmosis has occurred. ... At point A the graph suggests that no osmosis has occurred, suggesting that the concentration...
The overall result of osmosis is that water goes in the cell and the cell is expected to swell up. An example of osmosis in plants would be the absorption of water by the roots of plants. In animals, osmosis affects the supply of nutrients and the release of metabolic waste products. ... This lab was about diffusion and osmosis, in this lab we tried to organize the experiment the best we could. ... Conclusion This lab was about diffusion and osmosis, in this lab we conducted the experiment about how diffusion and osmosis work. ...
Key Words: semi-permeable, membrane, diffusion, osmosis, concentration gradient, homeostasis, isotonic, hypotonic, hypertonic Introduction The dependence of life processes on diffusion mechanisms could not be more prevalent. ... The spontaneous net movement of water across a semipermeable membrane from a region of low solute concentration to a solution with a high solute concentration, down a solute concentration gradient is known as osmosis. Osmosis allows cells to regulate the amount of water within their membrane in order to keep from shrinking or swelling (Glencoe/McGraw-Hill, 2006, p. 83...
Discussion and Conclusion Introduction: Background Information In the permeability lab, I gained an understanding of the principles of diffusion and osmosis. ... Osmosis is the diffusion of water through a selectively permeable membrane from a region in which it is highly concentrated to an area that has a lower concentration. ... Osmosis is important because it helps distribute nutrients and discharge metabolic waste products. ... Without osmosis, organelles would have a hard time carrying out duties; such like distribution of minerals and releasing waste. ... Discussion and Conclusion The p...
