Osmosis coursework conclusion - reflective paper topics


 

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osmosis coursework conclusion

osmosis coursework conclusionOsmosis coursework conclusion -The smallest substance was IKI, followed by water, glucose, the membrane pores, then the starch molecules.Also, obtain graph paper and graph the values given for the zucchini percent change in mass and molarity of sucrose solutions in the graph 1.3. Observe under a light microscope and sketch what you see.The starch didn’t leave the beaker because its color was amber and the starch molecule was much too large to pass through the selectively permeable membrane.Graph the increase and decrease in mass of the potato cores according to the molarity of the solutions they were placed in on graph 1.2.In distilled water alone, I predict that the water in the potato will be more concentrated.Remove the cores, blot off excess solution, and weigh the samples, recording the mass in the data table.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¡¨.Tie off the other ends securely with string, careful to get any air bubbles out and leaving room for expansion. Weigh and record the initial mass of the dialysis bags in the data table. Remove each bag, blot the sides to get off extra solution and weigh and record mass in grams each bag and determine the mass difference and percent change in mass. Lab 1C: Pour 100m L of the assigned sucrose solutions into their 250m L beakers (pre-labeled). Using a core borer, take 24 samples out of the potato, and measure each in centimeters so that they are all equal in length (use the knife to slice off ends). Place these cores in a covered beaker until an electronic balance can be obtained.Quantitative data uses numbers to measure observed changes.When the potato is placed in 0.4 molar solutions, the substances will still be very similar but the concentration of the water solution should be slightly greater to that of the potato. As the molar solutions get higher, the water will transfer more and more from the potato to the water solution, therefore decreasing its size and weight.When a plant cell is in an isotonic solution, the turgor pressure decreases, causing wilting in the plant structure.The results simply state that the water, glucose, and IKI were small enough molecules to pass through the selectively permeable membrane.Lab 1E – The materials used in conducting this experiment are as follows: a light microscope, microscope slide, cover slip, distilled water, Na Cl solution, paper, pencil, and onion skin.This means that the solutions have the same concentration of solutes.In the following essay, I will explain the effects that the cultivation of the sugar beet had on the production of cane sugar.When the concentration of the water is lower, more water molecules are allowed to pass through the potato cell. If the concentration levels of the solution are higher, the cells will lose water and cause the potato to lose weight and therefore shrink.A living system also contains an active transport to create movement of particles like ions that move against their concentration gradient.Osmosis is the diffusion of water from a lower concentration of solute to a higher concentration of solute, through a membrane.In a high concentration of water the amount of solute (e.g. These solutions are usually known as a dilute or weak solution. Which Sugar Concentration Osmosis Best Takes Place on a Potato Chip I am going to conduct an investigation to find out at which sugar concentration osmosis best takes place on a potato chip. This means that it is a process that does not need any energy to take place.In hypertonic solutions, plants plasma membrane shrinks away from the cell wall, an action termed plasmolysis.osmosis coursework conclusionAccording to an article Sugar Beet from the Encarta Online, Blockade of Continental ports during the Napoleonic Wars cut off the supply of sugar cane from the West Indies and favored a development...I predict that the weight of the potato in the sugar solution will decrease when it reaches 3:1 (salt: water).Osmosis is the spontaneous movement of a solvent (-in this case water) from a place where its chemical potential is higher to another place where it is lower, through a semi-permeable membrane (-such as a cell membrane)....I used salt solution in three different concentrates: 0.0M, 0.5M and 1.0M. Investigate the Effect of Varying Solution Concentration on Osmosis in a Potato Chip Prediction A definition of osmosis is: 'the movement of water molecules from an area of high water concentration to a low water concentration across a semi-permeable membrane' (Oxforddictionary 2000).The plant cells used in the experiment are potato and Chinese radish tissues that are used as chips because the results and...What results would you expect if the experiment started with a glucose and IKI solution inside the bag and only starch and water outside? Based on the size of the molecules, the glucose and IKI would move out of the bag, the water in, and the starch left in the beaker again. Predict what would happen to the mass of each bag in this experiment if all the bags were placed in a 0.4M sucrose solution instead of distilled water. These are inversely proportional because whenever the sucrose molarity inside the bag is more concentrated, it will become more dilute and vise versa.Test this solution for the presence of glucose as well with the Testape. Record final colors of solutions in the bag and in the beaker.Because of this, the water should transfer from the solution to the potato, and the potato will gain weight.Osmosis is defined as the net movement of water or any other solution with molecules from a region in which they are highly concentrated to a region in which they are less concentrated. Partially permeable membranes (or sometimes called semi-permeable membranes) are very thin layers of material that allow certain things to pass through it while preventing other things from passing through.This experiment takes place to measure the diffusion of small molecules through dialysis tubing.Test both solutions once more for the presence of glucose with the Testape strips. Obtain six 30cm dialysis strips that have been presoaked in distilled water. Pour approximately 25m L of each sucrose molar solution into its respective bags (that should be labeled, but not on the tubing itself).In put Variables: -Molarity -Size of potato -Mass of Water -Molarity of Sugar -Length of time in the...When a potato is placed in water, the cells will expand by gaining weight depending on the concentration levels of the solution.The differences in mass don’t deal with the proportional aspect of the solutions, making the real results less accurate.The equation is water potential equals the sum of pressure potential and solute potential. This is a pressure available to plants in a hypotonic environment.Glucose and water left the bag, the evidence was the Testape color. Include the concentration differences and membrane pore size in your discussion.Materials: Lab 1A – The materials used in conducting this experiment are as follows: one 30cm strip of dialysis tubing (presoaked), distilled water, 15%glucose/1%starch solution, 250m L beaker, Iodine Potassium Iodide solution, glucose Testape, and string.An area of high water concentration is a dilute solution of the substance added to it to water to alter its...Determine the mass difference, the percent change in mass and the class average percent change in mass.Introduction: I have been asked to investigate the effect of osmosis on potato chips. osmosis coursework conclusion Prediction I predict that when the lower the concentration of sugar solution in the water, the more the potato will expand by osmosis.Data: Table 1.1 The presence of glucose in beaker and bag solutions Questions: Which substance(s) are entering the bag and which are leaving the bag? Iodine Potassium Iodide is entering the bag because the indicator’s color is concentrated in the bag when the IKI started only in the beaker.Why did you calculate the percent change in mass rather than simply using the change in mass?Problem: In the following experiment I am going to try and determine- "Why does raw turnip taste sweeter than raw potato." I will find this out using osmosis.This will help me to discover how to make this investigation fair and safe.Lab 1D – The materials used in conducting this experiment are as follows: graph paper, pencil, a ruler, a calculator, and colored pencils.In the early nineteenth century, the West Indian Sugar Industry suffered as a result of the cultivation of the sugar beet.How Osmosis Affects A Potato Aim: - To See How Osmosis Affects A Potato Preliminary work Prediction: -I predict that the weight of the potato in the sugar solution will decrease and the weight of water will increase.This tubing acts as a selectively permeable membrane, allowing larger molecules to pass through, but slowly.For my preliminary test I decided to use potato cylinders 3cm long and I would see if the cylinders increased or decreased in mass.Rate of Osmosis Between Potato Cylinders and Sucrose Solution Introduction I am doing an investigation, to find out on how varying one factor effects the rate of osmosis between potato cylinders and Sucrose solution.Quantitative data would include the initial and final percent concentrations of the glucose, therefore showing the concentration of water by the change of percent in glucose.Experiment to Investigate Osmosis in Potatoes The aim of this experiment is to investigate the movement of water in and out of plant cells.Scientific Theory: Osmosis is defined as the movement of water molecules across a partially permeable membrane from a region of high water...Hypothesis: Diffusion and osmosis occur between different molar solutions until the solutions are isotonic, effecting the turgor pressure of plant cells.Background Knowledge: We already know that the average concentration of dissolved sugar in turnip is 0.62M. Using Osmosis, which we were taught last year in school, we can find out if potato contains less sugar than...I will discover this using my knowledge of the biological process of Osmosis.I have chosen to investigate the effect of the water potential/concentration of solution on potato chips. Osmosis in Potato Cells I am going to do an experiment to find the concentration of solute in potato cells.When the two solutions on either sides of the membrane are equal and no net movement is detected, the solutions are isotonic.In a high concentration of water the amount of solute (e.g.... osmosis coursework conclusion Add a few drops of the Na Cl solution, observe, and sketch what you see there as well.The energy source ATP is used during this process to move the particles across the cell membrane.Introduction: Kinetic energy, a source of energy stored in cells, causes molecules to bump into each other and move in new directions. Diffusion is the random movement of molecules to an area of lower concentration from an area of higher concentration. This is the diffusion of water through a selectively permeable membrane from a region of higher water potential to a region of lower water potential.Turgor pressure gives plants their structure and strength.Lab 1D: Using paper, a pencil, and a calculator determine the solute potential of the sucrose solution, the pressure potential, and the water potential.Investigating the Effects of Sucrose Concentration on Osmosis in Potato Tissue PLANNING ======== We have been asked to research the effects of sucrose concentration on osmosis in potato tissue.The most extreme shrinking should occur when the potato is placed in...If two solutions differ in the concentration of solutes that each has, the one with more solute is hypertonic. Water potential is predicting the movement of water into or out of plant cells.There should be little change to the size and weight of the potato.In the 0.2 molar solutions, the substances will be very similar in concentration.The movement would be noticeable in the concentration because it is known that water moves from high water potential to a low water potential.In order to find the best way to do this experiment I am going to do a preliminary test first.Dialysis is the movement of a solute through a selectively permeable membrane.It is abbreviated by the Greek letter psi and has two components; a physical pressure component, pressure potential, and the effects of solutes, solute potential.Lab 1B – The materials used in conducting this experiment are as follows: six presoaked strips of dialysis tubing, distilled water, 0.2M, 0.4M, 0.6M, 0.8M, and 1.0M solutions of sucrose, six 250m L glass beakers, string, and an electronic balance.Water potential is the measure of free energy of water in a solution.Explain the relationship between the change in mass and the molarity of sucrose within the dialysis bags. The solutions will reach equilibrium somewhere between the two concentrations.Procedure: Lab 1A: Obtain a 30cm piece of dialysis tubing that has been presoaked in distilled water. Open the other end of the dialysis tube and insert 15m L of 15%glucose/1%starch solution.Fill a 250m L beaker with distilled water and add approximately 4m L of Lugol’s solution (IKI) to the distilled water. Let this stand for approximately 30min, or until distinct coloration is observed.The effect of osmosis in potato cells with different concentrations of sucrose solution Aim: To test the effect of different concentrations of sucrose solution to osmosis in a potato cells by putting potato pieces in test tubes of water containing different concentrations of sucrose solution. osmosis coursework conclusion The starch didn’t leave the beaker because its color was amber and the starch molecule was much too large to pass through the selectively permeable membrane. osmosis coursework conclusion




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