In this experiment‚ we had to demonstrate the process of osmosis using potatoes‚ and to determine the concentration of the cytoplasm of the potato. To demonstrate this‚ we had 6 test tubes and poured in different sucrose solutions of the following concentrations: 0.0M‚ 0.1M‚ 0.2M‚ 0.5M‚ and 1.0M. Once added in with all the sucrose solutions‚ we added in the 6 cylindrical potatoes of equal diameter and length. Before and after putting it in the potatoes‚ we had to weigh the initial and the final mass
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and Brownawell 2010). While trying to find the reason why these rivers keep getting contaminated‚ Brownawell found out that the wastewater areas found in surficial sediments around the Hudson River contained Quaternary Ammonium Compounds. High Concentrations of the Quaternary Ammonium Compounds are mostly found in muddy and sediment areas allowing contaminated sewages to continuously occur in urban estuary sediments (Li and Brownawell 2010). Many Quaternary Ammonium Compounds have a substance called
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The amount of solute dissolved in a solvent is called concentration and it can be expressed in several different ways. First and foremost‚ the expression of concentration can be in term of molarity. Molarity is the number of moles of solute per liter of solution. The unit of molarity is M and is read as molar. Molarity = moles of soluteliter of solution (Normality‚ 2012) Normality (N) is another way of expressing the concentration of a solution. It is based on an alternate chemical unit
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Chemical Equilibrium- Le Chatelier’s Principle; Chemistry 0993 By Amanuel asgodom For Dharinee Doobur-Choytun Partner cherry November 28‚ 2013 Purpose: To observe and record Le Chatelier’s Principle on how temperature & concentration change affects in a reaction. Apparatus and materials; See on chemistry lab manual 0993e chan henry j johnstone- g pawelchack Vancouver community college. Page 52… le chateliers principle. See the detail from the le chateliers principle Prelab
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TOPIC: Food Tests – Semi Quantitative Test AIM: To determine the concentration of glucose present in an unknown sample‚ using a semi quantitative glucose test APPARATUS AND MATERIALS: 4% stock solution of glucose‚ water‚ 6 test tubes‚ ruler‚ water bath‚ solution of unknown concentration (Sample A)‚ Benedict’s reagent METHOD: 1. Solutions of different concentration were made from the stock solution and placed in test tubes.
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08.2013 TITLE: Transport across membrane OBJECTIVES: To investigate the effect of concentration of blackcurrant squash on osmosis in chipped potatoes. INTRODUCTION: In biology‚ osmosis is defined as the diffusion of solvent molecules (usually water molecules) across a semi-permeable membrane from a region of lower solute concentration to a region of higher solute concentration. Osmosis is of great importance in biological processes where
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kidneys and the osmolarity of urine. Measurements of urine volume‚ specific gravity and chloride concentrations were recorded in order to investigate this. Our hypothesis stated that the volume of urine would increase for all groups other than the group drinking 80 ml of water along with taking a 7g. This portion of the hypothesis was developed based on the relationship between salt concentrations in the blood and the release of antidiuretic hormone (Martini‚ Ober‚ Nath‚ Bartholomew‚ & Petti‚ 2018)
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Solution A homogeneous mixture of two or more substances with each substance retaining its own chemical identity. Solute – substance being dissolved. Solvent – liquid water. General Properties of a Solution 1. Contains 2 or more components. 2. Has variable composition. 3. Properties change as the ratio of solute to solvent is changed. 4. Dissolved solutes are present as individual particles. 5. Solutes remain uniformly distributed and will not settle out with time. 6. Solute
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of different concentrations. The water passes from a region of high concentration to a region of low concentration‚ until the two concentrations are equal in concentrations of water. Many cell membranes behave as semi permeable membranes‚ and osmosis is a vital mechanism in the transport of fluids in living organisms‚ for example‚ in the transport of water from the soil to the roots in plants. If a cell is in contact with a solution of lower water concentration than its own
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Principle‚ Beer’s Law and Spectrocopy. The first reaction was run to completion using LeChatier’s Principle and the second reaction was run to equilibrium. A spectrophotometer was used to measure absorbances. Using a graph of absorbance versus concentration of FeSCN2+ was used to determine that the molar absorptivity constant was 3670. Beer’s Law was used to determine that the average equilibrium constant was 33.1793. Introduction: The purpose of this experiment is to determine the value of the
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