In osmosis, water diffuses across the area of lower solute concentration to that of higher solute concentration until the solute concentrations of the environment and the cell are equal. I then subtracted the final mass from the initial mass, to find out the change in mass. Osmosis potato lab report - Online Student Writing Company - Get Help With Non-Plagiarized Essays, Research Papers, Reviews and Proposals Quick. Osmosis is a special form of diffusion involving only water molecules. A vital variable that must remain constant is the origins of the potato tuber samples within the potato itself.
Therefore care should be taken. By using Osmosis, determine what the sugar concentration of cell sap is. Using all of my recorded result I will be able to determine at what sucrose concentration would be required for no net water movement and therefore and equal water potential by plotting a graph. After coming back to the lab in the next day, we used another potato to continue. Comparing the graphs, they have same trend even though the value of each element is different. The readability could be improved if some of the key information was in the form of tables rather than long paragraphs of text. The trend is that it is a negative correlation and there is a high Jump at every two points e.
Investigating the Water Potential of Potato Cells Essay Sample Research question: how is water potential of potato cells differ in different sucrose concentration? Lab 5: Osmosis, Tonicity, and Concentration. This shows that the potato cell reached equilibrium. The hypothesis of the experiment was, if there is a high molarity of solute then the water potential would be lower or negative. This is because water is moved into or out of the plant cell and therefore a change occurs to its mass. The result for this movement is the decrease in mass of potato cells. We have to make sure the space and surface where the experiment is going to be carried out should be dry and tidy as watery surrounding may affect the results.
Water enters a cell through the partially semi by osmosis. Potato was first cultivated between 3 and 7 thousand years ago, some scientists believe they may have grown wild in the region as long as 13,000 years ago. This was achieved through placing potato cores in different concentrations of sucrose 0. Objective: To determine the solute concentration of a potato. Based on scientific principles, did you observe what you expected? If there is a partially permeable membrane, like a cell membrane, separating two different samples of water, there will be a net movement of water from the place with higher water potential to the place with lower water potential. The water molecules also move through a partially permeable membrane. Potato is the third most important.
Sweet potato has high concentration of solute molecules. Its flesh should be slightly discolored, and the potato will be much softer than the one sitting in the fresh water. My potato tuber cell samples will be within these two amounts. To obtain value for solute potential of the sweet potato I have relied on the results of mass change against the concentration as the readings obtained forms a pattern on the graph. As the concentration of sucrose increases the difference in mass ofpotato will increase since sucrose is a hypertonic solution whichmeans that it has a higher amount of particles dissolved in thesolution, while a hypotonic solution such as water where thereisfewer particles dissolved. Water in potato cells will be lost because of evaporation Put the potato cubes in a box with lid or Petri dish with wrap after cutting. Temperature:Temperature is one of the factors that affect osmosis, due to theexistence of more kinetic energy as temperature increases meaningmore effective collisions so we start by Using room temp to maintainVariable Reason? The one in the salty solution will have shrunk, indicating that water is diffusing from a less concentrated solution to a more concentrated solution.
Cell, Cell membrane, Cell wall 1477 Words 7 Pages ater Potential of a Potato Chip Aim: To find out the water potential of potato cells using different concentrations of sucrose solutions. Another factor would be that the sugar around the potato piecesmight not have been distributed equally so each potato cylinder myhave contained a different amount of sugar thusly affecting the rateof osmosis. Conclusion These are mainly random errors which are caused by mistakes made while handling or reading equipment. The problem of this lab was, if there was a high molarity of solute, would it have a positive or negative water potential? Peano Block 1 Introduction: Potatoes are just your average food; they have been around for as long as the human race can remember. I think this is because as the concentration of the sucrose increases there are more solute molecules in the solution. The discussion of the results was thorough and was explained using relevant biological theory. Cell biology, Chemistry, Concentration 1379 Words 4 Pages 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.
Evaluation: The hypothesis and the result of the experiment were similar, we can conclude that the experiment was accurate. Cellulose fibers are freely permeable, allowing water and solutes to reach the plasma membrane. This is because animal cells do not have a cell wall. Putting potato strips into sucrose solution of various concentrations and find. This extra water may have caused the sample to have less solute in it than the solution, making it less dense. The two biggest change in mass of potato cubes show two opposite trends very clearly. Here, water molecules are constantly moving in a random fashion.
Cut two small plugs of potato so they are equal in size. Concentration, Force, Mass 956 Words 4 Pages electrolytes on the potential difference in a voltaic cell Introduction When two electrodes made of different metals are connected together in a voltaic cell, the chemical energy present is converted into electrical energy and an electromotive force is generated. While waiting, Set out paper towels to dry potato tuber. When these cells are put into pure water, water moves into the cell because there is a lower water potential in the cell. Cell, Cell wall, Osmosis 1523 Words 5 Pages requiring no energy.