Objective In this experiment we would be ascertaining the percentage content of ethanol in 3 samples (spirit‚ wine and a beer). We would be comparing the concentration of ethanol to that of 25%propanol which would act as an internal standard. Method To set up the standards for a calibration curve we would make solutions of different concentrations of ethanol. Using a 25cm3 volumetric flask we would put 10cm3 of 25% Propanol into each one which would act as an internal standard. We would then add
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9/17/2013‚ Lois Andersen & Claire Ma “The Power of Osmosis” The purpose of the lab was to discover‚ through osmosis‚ the concentration of sugar water in a potato. First‚ potatoes were cut into strips about 3 centimetres in length and six strips were individually massed. Next‚ the six strips were placed in 6 different Dixie cups‚ labelled A‚ B‚ Q‚ X‚ Y‚ and Z. Each of the Dixie cups were then filled just enough to cover the potato strips‚ with substances that matched the letters of the cups
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Philippines ------------------------------------------------- Christian Tica‚ Ryan Tabernilla‚ Michael Siao‚ Ron Mabunga‚ Jaime Olivares‚ and rest of Team Pogi Abstract ------------------------------------------------- By measuring the concentration of the hydroxide ion from a solution saturated with Ca(OH)2 titration analysis against HCl‚ the experiment’s objective is to determine the solubility constant of calcium hydroxide. But‚ there are few limitations in solubility constant concept‚
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AE 6766 Project 3 Nonpremixed Flames Introduction: In order to understand the structure of non-premixed flames‚ this projects employs a type of opposed flow diffusion to generate a nearly one-dimensional an axisymmetric diffusion flame. The one dimensional character of this flame is significant because it reduces complexities compared to a 2 dimensional flame‚ which allows for manageable and practical calculations. Moreover‚ this type of flame can be generated and easily investigated in the
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to determine the percent zinc in post 1982 pennies‚ 50 ml of an HCl solution was used to react (dissolve) all of the zinc in the penny. To ensure complete reaction‚ the solution contains twice as many moles of HCl that is actually needed. What concentration of HCl should be used? - (0.074 mol HCl / 0.05 L) = 1.48 M 8. In the scenario described in
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units of density are quoted in (g/mL) for liquid samples of matter. For that reason if the volume is known of a liquid‚ determining its density is easily determined by weighing it accurately. Density can also be used as a tool for finding the concentration of solutions in some cases. The density is different in a substance when a substance is added to a pure liquid to when both the solute and solvent were separate all together. There are many ways to determine density. This method determined the
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Biomes Comparison Essay Ecologists group earth’s diverse environments into biomes. A biome is a complex of terrestrial communities that develops a large area and is characterized by certain soil climate conditions and particular assemblages of plants and animals. Not all species live in every biome they vary in their adaptations to different conditions. An adaptation is an inherited characteristic that increases an organism’s ability to survive and reproduce. These sorts of variations in plants
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prepared with 5% sucrose solution and were soaked in solutions of different concentrations. The diffusion of water across a semi-permeable membrane is called osmosis. When water diffuses‚ the water molecules move from a hypotonic environment to a hypertonic environment. Hypotonic means less concentrated than another solution. Hypertonic means more concentrated than another solution. If two solutions have equal concentration‚ they are said to be istonic Hypothesis: If three 8 in. sections of
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potential‚ the basis of osmosis. The experiment proved how water molecules in a solution are able to move from an area of low solute concentration‚ high water concentration‚ to an area of high solute concentration‚ low water concentration‚ diffusing “down” the water gradient. The movement of solutes from the area of high concentration to the area of lower concentration that surrounds them will be tested to hopefully demonstrate the accuracy of osmosis‚ as determined by the water potential equation
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Abstract Literature on Van’t Hoff’s law states that water potentials and zero weight change osmolalities will be the same for potato cores placed in varying concentrations of solutes of NaCl‚ glucose‚ and sucrose. This experiment was designed to test these predictions and compare them to data gathered course wide. We found that the mean water potentials were all within 0.26 bars of each other‚ and that the zero weight change osmolalities were all within 0.035 mols of each other. This supported Van’t
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