Osmosis and water potential Aim of the experiment: Finding the water potential of potato. Biological principles: Independent variable: concentration of the solution. Dependent variable: percentage changed in weight of the potato strips. Controlled variable: size of the potato strips‚ it can be controlled by cutting the length of the strips. Procedure: Table 1. Concentration of sucrose solution table Concentration/ M | Sucrose Solution/ ml | Distilled Water/ ml |
Premium Water Concentration Solution
Investigating the Water Potential of a Potato. I have been asked to investigate the water potential of a potato. During my investigation I will not actually be able to measure a value for‚ as it is a pressure value (kPa). Osmosis is a special form of diffusion involving only water molecules. It is defined as "The passage of water from a region of high water potential to a region of low water potential through a partially permeable membrane" Definition of Water Potential. The potential for water to move
Premium Osmosis Cell wall Cell
Aim: What is the effect of changes in sucrose concentrations on the water potential of potato cells? Raw Data: Suscrose concentration (0.00M) Group 1 Group 2 Group 3 Group 4 Change in mass (g) (+/-0.1g) 0.04 0.19 0.10 -0.27 Change in length (mm) (+/- 0.1mm) 0.00 0.00 0.00 0.30 Suscrose concentration (0.10M) Group 1 Group 2 Group 3 Group 4 Change in mass (g) (+/-0.1g) 0.29 0.44 0.22 0.08 Change in length (mm) (+/- 0.1mm) 1.10 0.30 0.30 0.70
Premium Standard deviation
Measuring the Water Status of Potato Tubers Objectives: Upon completion of this laboratory you should be able to: 1. determine the water potential of a plant tissue by the Chardokov and gravimetric techniques and understand the underlying theory. 2. determine the osmotic potential of a plant extract by the freezing point depression method and understand the underlying theory. 3. describe techniques for measuring the pressure potential of a plant tissue. 4. describe techniques for measuring
Premium Cell wall Tuber Osmosis
Osmosis in Potato Tubers Andrew Dickson Background When a plant cell is bathed in a solution of the same concentration (isotonic) as its intracellular environment‚ its mass and volume remain the same. This is because water enters and leaves the cells at the same rate. There is no net loss or gain of water by osmosis. Samples of cells can be placed in a range of solutions of different concentration. The cells will gain water by osmosis when placed in solutions which are more dilute (hypotonic)
Premium Concentration Osmosis Potato
Estimating Osmolarity by Change in Weight Abstract Optimum water content for normal physiological processes in plants is crucial. In order for normal activities to take place‚ the amount of water relative to osmotically active substance (OAS) in cells must be maintained within a reasonable range. The one way to estimate optimum water content is to find osmolarity of plants cells. Osmolarity can be indirectly measure by comparing change in weight and volume when plant cells are incubated in
Premium Osmosis Cell wall Molecular diffusion
Investigating the water potential of a potato Aim Osmosis is the movement of water molecules from a region of high water concentration to a low water concentration through a semi-permeable membrane. Our aim is to investigate the water potential of a potato through osmosis‚ by finding the difference in weight before and after the potato has been set in a solution of water‚ sugar or salt. Trial Method Firstly we collected the equipment. This included a scalpel‚ potato cutter‚ and test tubes. Then
Premium Osmosis Concentration Potato
OSMOSIS Aim To determine the water potential of potato tuber cells. Background knowledge Osmosis is defined as the movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane. Osmosis is considered in terms of water potential and solute potential. Water potential is a measure of the kinetic energy of water molecules. Here‚ water molecules are constantly moving in a random fashion. Some of them collides with cell
Premium Osmosis Cell membrane
Lab Topic: Movement of Materials Across the Cell Membrane—Potato Tuber Cells Introduction: Osmosis is a form of diffusion in which water diffuses through a selectively permeable membrane from a region of high concentration to a region of lower concentration. This form of diffusion takes place when the molecules in high concentration are too large to move through the membrane. Three factors that determine cell membrane permeability are shape‚ size‚ and polarity. For this experiment‚ it must
Premium Osmosis Semipermeable membrane Tuber
Investigating the Water Potential Of Potato Cells Aims 1. To test how water potential‚ in a solution‚ affects the movement of water in and out of a cell by osmosis Prediction I predict that by increasing the water potential around the outside of the potato cell‚ (i.e. so that the water potential is greater outside the cell compared to the inside of the cell e.g. 0m sucrose) that the net movement of water into the cell will increase. This is due to the water potential being greater outside the cell
Premium Osmosis Diffusion Concentration