Osmosis And Water Potential Essay

438 words - 2 pages

Title:Osmosis and water potentialAim 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 tableConcentration/ M | Sucrose Solution/ ml | ...view middle of the document...

Prepared 6 solutions. 0.2M, 0.4M, 0.6M, 0.8M, 1M sucrose solution and water. (Table 1)2. Filled six boiling tubes with 5 cm3 of the solutions and labeled the boiling tubes.3. The potato should be cut into 6 strips by cork borer and should be cut with the same length of 5 cm.4. The potato strips should be dried.5. The initial reading of the mass should be recorded.(Table 2)6. Each boiling tube should be immersed one strip.7. Strips should be taken from the solutions by the forceps after 30mins.8. The potato strips should be dried.9. The second reading of the mass should be recorded.(Table 2)10. Calculate the percentage changed in mass.Table 2. Initial and final reading of mass and percentage changed in mass| 1 M | 0.8 M | 0.6 M | 0.4 M | 0.2 M | Water(0M) |Initial mass (g) | 1.01 | 1.02 | 1.04 | 1.01 | 0.98 | 1.02 |Final mass (g) | 0.78 | 0.83 | 0.89 | 1.01 | 1.08 | 1.21 |Percentage change* (%) | -22.8 | -18.6 | -14.4 | 0 | 10.2 | 18.6 |*percentage changed: [(final - initial)/initial] x100%Fig 1. Procedure graph P.1Result:From the graph, 0M (water) and 0.2M sucrose solution have higher water potential than the cell sap. Water molecules entered the cell by osmosis. Because of it, the cell became heavier,...

Other Essays Like Osmosis and water potential

Ijgajewga.Doc Essay

719 words - 3 pages concentration through a semipermeable membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure. The largest and most important application of reverse osmosis is to the separation of pure water from seawater and brackish waters; seawater or brackish water is pressurized against one surface of the membrane, causing transport of salt-depleted water across the membrane and emergence of potable drinking water from

Osmosis Lab Report

746 words - 3 pages and after osmosis. And the result was that as the concentration increase, the rate of osmosis also increases, this tells that there is a decrease in mass. And it shows that my hypothesis was correct, “the concentration of sugar where the water potential is higher than the water potential of the potato, the mass of the potato will increase. On the other hand, if they have similar water potential, the mass will not change.” According to the

Use of Water in Semiconductor Industry

1754 words - 8 pages . Incoming feed water that is high in suspended solids can cause a high pressure drop and reduce the effectiveness of downstream filtration equipment such as reverse osmosis membranes and ion exchange beds. 2. Deionization: Capacitive deionization (CDI) is a technology to deionize water by applying an electrical potential difference over two porous carbon electrodes. Anions, ions with a negative charge, are removed from the water and are

Reproduction

1278 words - 6 pages there would therefore be more space for osmosis to occur. Doing all the tests at one temperature will control the temperature. 1. For the purpose of my experiment I am going to do all the experiments at room temperature. 2. To keep the water potential of the potato initially will be kept the same by using the same type of potato, which have been treated in the same way, e.g. have all been cut without being washed and peeled. 3. The mass of

In this experiment we are going to be studying the affects of Osmosis

1030 words - 5 pages the same size. If the medium has a lower concentration of water than the cell, the cell will lose water by osmosis. The water will cross the cell membrane in both directions, but now more water leaves the cell than entering it. The Result of this will mean the cell will shrink. Variables In this experiment I am going to cut 12 potato sections, I am going to try keeping these roughly the same size and weight. They will be around 4cm

An Experiment to Investigate Osmosis in Plant Tissue

3408 words - 14 pages solution (has a High Water Potential) to a more concentrated solution (has a Low Water Potential) through a selectively permeable membrane in order to achieve equilibrium. A membrane that allows water to pass through, but not solute molecules. Osmosis is a biological process If equilibrium is ever achieved then water molecules will move back and forth between the substances. If a surrounding sucrose solution has a lower water

Seawaters

749 words - 3 pages economic growth will call for more desalination mills. Benefits and Potential Hazards There are mass assets with the transformation of seawater into natural drinking water. Military forces of the United States utilizes the reverse osmosis process for the overseas platoons. This method was used for the platoons in Iraq (Fischetti, 2007). Nascent countries that don’t have access to freshwater, this method saves lives and individuals from being

Osmosis Investigation

1745 words - 7 pages Osmosis Investigation To se 6/03e how varying the concentration of Sucrose solution affects the water Gain or loses on a potato Chip during osmosis. Aim To investigate if osmosis occurs in potatoes and whether varying the concentration of sucrose solution affects the water/mass gain or loss in the potato chips when kept in a constant environment. Equipment * 5 same volume test tubes: to

Eco Water Inc. (Eco)

848 words - 4 pages NAME OF COMPANY: ECO WATER INC. (ECO) NAME OF PRODUCT: PURITY II NATURALIZER WATER UNIT MANUFACTURER: ENVIRONMENTAL CONTROL INC. SWOT ANALYSIS STRENGTHS * ECO WATER INC. is a start- up company and it is natural that the stakeholders would be full of energy and zeal to make the company successful. * The market potential for this product is huge since consumers are concerned about their health and the safety of the water

Osmosis and Diffusion

1698 words - 7 pages that osmosis can occur in these situations because without it cells would die because of differing pressure from outside and inside.Â Â Â Â Â Â Â Â Â Â Â Â Â  The measurement that predicts the movement of the water is Ïˆ, or psi.Â  This is the measure of the water potential inside an individual cell. Î¨ can be either positive or negative depending on the solution the cell is in.Â  Î¨ is more negative when the solution is hypertonic, so the water is

The Molarity of Sugar Solution Inside Potato Cells

804 words - 4 pages The Molarity of Sugar Solution Inside Potato Cells Background Information Osmosis 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. Semi- permeable membranes are very thin materials which only allow certain things to pass through them. They will allow small molecules like Oxygen, water and Carbon Dioxide to pass

Related Papers

Forward Osmosis At Green University Essay

2110 words - 9 pages CONCLUSIONS………………….…………………………………………………………………………………………………9 WORKS CITED…………………..……………………………………………………………………………………………..…10 APPENDIX………………………...……………………………………………………………….………………………………11 TABLE OF ILLUSTRATIONS Table 1: Where do you believe most of water is wasted? Fig 1: Waste Water Fig 2: Forward Osmosis and Reverse Osmosis Fig 3: Forward Osmosis for Desalination INTRODUCTION The new trend in modern days is to protect the

Diffusion And Osmosis Essay

1574 words - 7 pages Krysten Barsobia 12-7-11 3rd Hour Diffusion and Osmosis In this lab we will observe the process of diffusion and osmosis and also learn the effect of solute concentration to water potential to living plant tissue. Abstract The lab shows how each solutions differ, having high and low concentrations. We see how diffusion and osmosis works. Water moves from higher to lower concentration. Higher concentrations lose water to lower

An Investigation Of Factors Affecting The Rate Of Osmosis

3802 words - 16 pages concentration. Hypothesis I believe that the bigger the difference in water potential the quicker the molecules will move and the quicker the rate of osmosis will be. Why Use Potatoes 1) They are cheap 2) They have homogenous tissue. This means that they have the same type of tissue throughout the potato, and so results won't be indifferent or unfair. 3) The cell surface membrane acts as a semi

The Effectiveness Of Osmosis Essay

1450 words - 6 pages chip will decrease. My reasoning behind this is that if the concentration of glucose is higher in the solution, then the water will leave the potato to dilute the solution and leave the potato with less water and a reduced length. The water will flow across the semi-permeable membrane from the potato to the solution to try to even out the potential gradient. However, if a potato chip is placed into a solution of 0 molar