Osmosis Practical Report Introduction: To determine the biological changes that occur to potato cores over a period of time in different solutions of sucrose and to relate these changes to the phenomenon of osmosis. Method: We soaked several discs of potato cuted using a cork borer with around 1 centimeter of diameter and 2 milimeters of lenght into sucrose solutions with a different range of concentrations from 0 to 1.0M. Then we weighed all the potato
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Introduction: In this experiment I aim to investigate the effect of the surface area to volume ratio on the rate evaporation of water in different sized containers. By measuring the time it takes for the whole amount of water to evaporate‚ a conclusion can be made about the validity of the surface to volume ratio in regards to the biological process of diffusion. Research Question: What is the effect of the surface area to volume ratio on the evaporation of water? Variables: - Independent:
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Introduction Cells have to interact with their environment‚ chemicals and water and in order to do so they must be able to move across the cell membrane and the cell. The movements within a cell are called Diffusion. When molecules move across a cell membrane it is known as Osmosis. Diffusion is the process by which molecules of a substance move from areas of higher concentration of that substance to areas of lower concentration. Diffusion can be the transfer of anything anywhere. However‚
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Melinda Alexander Abstract Expressionism In this essay‚ I will demonstrate a comparison of control and chaos in the painting methods between Jackson Pollock and Helen Frankenthaler. I consider both artists to operate at a type of controlled chaos. However‚ I find that Frankenthaler used more control in her painting method where she carefully applied colors to certain spaces. Pollock’s painting is more a result of his actions than a specific thought as where to apply a certain color in an empty space
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Diffusion and Osmosis Introduction Tonicity refers to the concentration of solutes in a solution (Lab 6-7). There are three stages of tonicity: Isotonic‚ hypertonic and hypotonic. Four unknown solutions were given and labeled as followed: Solution A‚ Solution B‚ Solution C‚ and Solution D. Since potato cells were used for this type of experiment‚ in an Isotonic solution the solute and water concentration are the same as inside the cell in which the isotonic solution contains 0.9% NaCl. In other
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Introduction The reason of this experiment was to identify the properties and effects of osmosis. Osmosis can be defined as the diffusion of water through a selectively permeable membrane. (Miller/Levine) Osmosis occurs when there is an area of higher and lower concentration. Osmosis is a type of diffusion. Diffusion is when molecules move from an area of higher concentration to an area of higher concentration. The three types of concentrations are hypotonic‚ hypertonic‚ and isotonic. When in comparison
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Introduction Molecules are constantly in motion due to thermal energy. Therefore‚ the molecules will move around and bump into each other. Because of this‚ molecules tend to spread out evenly into available space in a process called diffusion. Diffusion is the random process of molecules moving from areas of high concentration to low concentration‚ thus requiring no energy. Many of the substances that enter or leave the cell do so through diffusion. Osmosis‚ a type of diffusion‚ is the movement
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A cyclist rides her bike up a very steep hill. Which choice below properly describes this example in energetic terms? Both a) and d) are correct. Every time a source of energy is converted from one form to another: some of the energy is converted to heat‚ which is not a very usable form of kinetic energy. A green plant will grow if given nothing more than: water‚ light‚ and carbon dioxide The leaves of plants can be thought of as "eating" sunlight. From an energetic perspective this makes
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Lizz Radican Lab 4 2/24/14 The Diels-Alder Reaction: Results and Problems 1.) Table 1: Mass‚ Percent Yield and Melting Points for Diels-Alder Reaction Products. Product Mass (g) Percent Yield Melting Points (°C) Anhydride 8.87 88.2% 164.4-165.8 Dicarboxylic Acid 3.20 71.9% 176.6-180.1 Unknown 1.66 111% 168.7-176.0 2.) See attached calculations. 3.) Table 2: Anhydride Product IR Data: Functional Group or Bond Peak Location(s) (cm-1) Peak Intensity Symmetric
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(3-6 pm) OSMOSIS LAB REPORT INTRODUCTION Osmosis is a special type of diffusion where water molecules move down a concentration gradient across a cell membrane. The solute (dissolved substance) concentration affects the rate of osmosis causing it either to speed the process up or slow it down. Based on this‚ how does different concentrations of sucrose affect the rate of osmosis? If sucrose concentration increases in the selectivity-permeable baggies‚ then the rate of osmosis will increase
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