will be hot! 3. Measure 15 ml of milk and pour it into your small beaker. Use labeling tape to label the beaker: “Milk.” Remember‚ milk contains the sugar lactose. 4. Prepare a sucrose solution by dissolving a spoonful of sucrose in 100 ml of water in your 3rd beaker. Use labeling tape to label the beaker: “Sucrose Solution.” PREPARING TEST TUBES 1. Use labeling tape to label one test tube: “A-Milk and Lactase Enzyme Solution.” In this tube combine 2 ml of milk and 1 ml of lactase enzyme
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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
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pharmaceutical preparation of Panacetin‚ by using it ’s solubility along with other organic molecules. We know that Panacetin is made up of sucrose‚ aspirin and some other unknown substance. We know the substance has to be Phenacetin or Acetanilide. To help solidify our reasoning‚ we need a % recovery of 8-12% sucrose‚ 35-45% aspirin and 45-55% unknown. Sucrose for example is insoluble in dichloromethane‚ while aspirin is soluble in CH2Cl2‚ but not in H2O. The organic compound sodium hydroxide will
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Diffusion and Osmosis 3 AP Experiment Components Biology Lab # This experiment is designed for 10 lab groups Contents A B C D E Orange Indicator Dye‚ low molecular weight Blue/green dye‚ high molecular weight 1M Sucrose and 1M NaCl Powdered sucrose NaCl Dialysis tubing Store entire experiment at room temperature. 1 Requirements All components are intended for educational research only. They are not to be used for diagnostic or drug purposes‚ nor administered
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including glucose‚ starch‚ and iodine potassium iodide were tested for permeability through the dialysis tubing. In the second experiment‚ several potato tuber cylinders were tested in different sucrose solutions. The potato cylinders were tested to see what would happen to its mass if they were in different sucrose solutions. There are three major terms that are mandatory to know before experimenting: isotonic‚ hypertonic‚ and hypotonic. An isotonic solution is when the solute concentration inside a system
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Generally‚ it is made up of sucrose‚ aspirin and an unknown component‚ either acetanilide or phenacetin. SinceBy using different techniques‚ such as filtration‚ extraction‚ and evaporation‚ those three components have been isolated out‚ which is based on varies solubility and acid-based properties. The percentage of composition of Panacetin are also found‚ which is based on the mass of three dried components. The process: “panacetin” + Dichloromethane Solid sucrose + aspirin + unknown component
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Equipment: Refer to Biology 12 Lab Manual – Investigation 13 Procedure: Refer to Biology 12 Lab Manual – Investigation 13 Data and Observations: The Potatoes change in mass after the process of Osmosis Test Tube # | Concentration of Sucrose Solution (mol/L) | Initial mass (g) | Final mass (g) | Change in mass (g) | Percentage change in mass (%) | 1 | 1.0 | 5.12 | 3.63 | -1.49 | 29.0% | 2 | 0
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Potato Lab Report: Effects of Sucrose Solutions on Potato Cells and Water Potential Abstract: Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one‚ thus equalizing the concentrations on each side of the membrane. In this experiment‚ we learn about Osmosis and Diffusion through potato cores in different concentration of sucrose‚ (water‚ .2‚ .4‚ .6‚ .8‚ 1.0). We realized that
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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
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On our surface‚ inside and all parts in between‚ necessary units called cells are constantly keeping your body in a living condition. Robert Hooke is who identified and named cells. “He thought that the small ‚ simple units looked like the bare prison cells. His work launched a new frontier in scientific exploration that led to modern cell theory; all living things are made of cells‚ cells are the basic units of structure and function in all living things‚ and all cells come from the reproduction
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