In extreme cases the cell membrane breaks away from the cell wall and the cell is referred to as flaccid. The potato cells will have decreased in volume and mass. The greater the concentration of water in the so... ... middle of paper ... ... for example, with a carrot or an apple to see if osmosis affects them in the same way as it does potato. I would also widen the range of sugar concentrations to include 1.1M 2M. Moreover, I would like to see if and when the cells reach a maximum and minimum weight.
How does the concentration of sucrose affect the weight of pieces of potato after osmosis has taken place? Aim The aim of this is experiment is to investigate how much sucrose is in a potato. We are going to investigate the effect of different concentrations of sucrose on the weights of pieces of potato after osmosis has taken place. 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 water molecules move freely through the semi-permeable membrane this is a passive process. We will do this experiment by placing potato chips in different strength solutions and checking for mass increase/decrease. Prediction I hypothesize that if we place potato chips in different strength solutions that there should be different results, some with noticeable changes in mass the other will be nearly the same. The potatoes should gain/lose mass by the movement of water. If there is a change in mass it is because water has entered or left the cell.
2. To investigate the internal concentration of potato cells in terms of sucrose solution. Hypothesis For this investigation I think that the lower the concentration of the sugar solution in the test tube the larger the mass of the potato will be. This is because the water molecules pass from a high concentration, i.e. in the water itself, to allow concentration, i.e.
If a potato cell was placed in the same circumstances the cells would increase in length, volume and mass because of the osmotic effects. If the same potato cells were placed in a solution with a low water concentration, then the effects would be the opposite - water would move out of the cell into the area of lower concentration, the water. Thus, the potato chip will decrease in length, volume and mass. In more extreme cases, the cell membrane would break away from the cell wall and the cell is then known as plasmolysed. The higher the concentration of water in the external solution, the higher the amount of water that enters the cell by osmosis.
I believe this because each Molarity of sucrose will change the potato's water content. This will happen because either the concentration will higher in the sucrose and lower in the Tubas or lower in the sucrose and higher in the Tubers. Therefore water will travel in or out of the potatoes cell though its partial permeable membrane. Preliminary Method Â· I will firstly get 10 test tubes and to test tube racks Â· Then I will cut 9 pieces of potato Â· I will then get 3 different Concentrations of sucrose solution and add 20cm3 to each test tube Â· Cut a 4 mm in diameter tuba to 1 cm in length Â· Now I will measure the length and mass Â· Now place the pieces in Â· Now leave this for 15 minutes Â· Now I will measure the length and mass Preliminary Results After we did the Preliminary Test we decided to use 1 cm long 4 mm diameter tubas. We would put them in 25 cm3 sucrose solutions.
This is because the water in more concentrated inside the potato rather than outside the potato. Cells with a little water in them are known as flaccid. When a cell becomes too flaccid, it could be destroyed. A process called plasmolysis would occur – this is where the cell membrane comes away from the cell wall so there are big empty spaces between them. The graph will have a negative correlation because as the concentration of the sucrose solution increases; the mass of the potato cylinders will decrease.
Water moves across the membrane from a weak solution (high concentration of water molecules) to a stronger solution (lower concentration of water molecules). In this case, the two solutions are the cytoplasm inside the potato cells and the sucrose solution that I am placing my potato chip in. The partially permeable membrane is the cell membrane of the potato cells. When potato chips are placed in pure water, the concentration of water molecules surrounding the plant is higher than the concentration of water molecules inside the cytoplasm of the potato's cells. The water will diffuse into the cell and the cytoplasm by osmosis.
The Solute Concentration of a Potato To find out what the solute concentration of a potato is, this shall be done by finding out the effect of Osmosis on a potato. Prediction: That if there is more water outside the potato than inside, the potato will increase in size. If however there is less water outside the potato than within, then I shall expect the potato to shrink in size. I think this because of the laws of Osmosis. Osmosis is the diffusion of water through a partially permeable membrane from a high concentration gradient, to a low concentration gradient.
Prediction I think that the potato that is put in the test tube with water in will gain in mass. I think that the potato put into the salt solution will loose in mass. The higher the concentration of salt the, the more the potato will decrease in mass. I think this because if two solutions of concentrations of a solute (e.g. salt) in a solvent (e.g.