the salt. And after the filtration the sand was left. Separation of solute between immiscible solvents * IODINE CRYSTALS + WATER + N-HEXANE the N-hexane turned to color violet. The method used to separate that mixture is Extraction. Extraction is the distribution of a solute in two immiscible solvents. The substances that separated are H2O and Iodine crystals with N-hexane. The iodine crystals have a very low solubility in water and it dissolves quickly when it combines with N-hexane and when
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Macromolecules Lab Purpose: to determine a method of testing for macromolecules. Materials: Knowns: Unknown: Test Solutions: Glucose solution Unknown solution Iodine solution Gelatin solution Benedict’s solution Starch solution Biuret solution Oil Brown paper Water Procedure: 1. Create a data table. 2. Label 5 test tubes with known solutions. 3. Add 10-20 drops of each known solution to respective test tubes‚ do not mix pipets! 4. Add 3-5 drops of
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Maryely Ramirez Professor Theresa Sterner Bio Lab 105 04 November 2013 The Effects Environmental Temperature and pH have on the Activity of Porcine Pancreatic Amylase Introduction There are many types of enzymes and each has a specific job. Enzymes are particular types of proteins that help to speed up some reactions‚ such as reactants going to products. One of them is the amylase enzyme. Amylases are found in saliva‚ and pancreatic secretions of the small intestine. The function of amylase is
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Thin Layer and Column Chromatography of Extracted Total Lipids of Chicken Egg Yolk Aegan Matthew V. Amican‚ Karen Gem B. Ares‚ Ruvie Ann A. Ballester‚ Mark Joseph S. Barcelona‚* Katherine Carmen Isabel G. Calleja‚ Christelle Venus F. Capuno‚ Group 1‚ 2DPH‚ University of Santo Tomas Abstract Lipids are one of the major constituents of foods‚ and are important in our diet for a number of reasons. They are a major source of energy and provide essential lipid nutrients. This experiment determined
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Then you titrate the iodine remaining with sodium thiosulfate solution using starch indicator. Because you know how much iodine was produced from iodate(V) and iodide and you have found by titration how much is left over you can calculate how much iodine must have reacted with the ascorbic acid. First you will need to analyse a solution of ascorbic acid with a known composition. By doing
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Aim In this assignment I am going to carry out a practical examination on a plant (onion) and an animal (cheek) cell under a light microscope. The stain methods I am going to use are iodine for my onion cell and methylene blue for my cheek cell. Introduction All animals and plants are made up of cells. Animal and plant cells are made from millions of tiny cells‚ so small that we are unable to see them with our naked eye. Animals and plants have many features in common within a cell such
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Diffusion and Osmosis NGSSS: SC.912.L.14.2 Relate structure to function for the components of plant and animal cells. Explain the role of cell membranes as a highly selective barrier (passive and active transport). SC.912.L.14.3 Compare and contrast the general structures of plant and animal cells. Compare and contrast the general structures of prokaryotic and eukaryotic cells. AA Background: (Source: www.explorelearning.com) Diffusion is the process in which there is a net movement of
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certain tests to determine the presence of macromolecules. In doing the lab‚ one was able to determine the characteristics of the given solutions‚ containing different macromolecules‚ whilst doing the multiple tests. The tests performed were‚ iodine testing for starch and glycogen‚ Benedict’s test for reducing sugars‚ and the Biuret’s test for protein. Depending on the test performed‚ certain results acquired‚ clearly identified the macromolecules present in each solution. With the aid of the
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Introduction Chromatography is a technique used to separate a mixture into its individual components. In this experiment‚ chromatography is done by using a thin layer chromatography (TLC) plate and filter paper. The word ‘chromatography’ itself means the separation of colours. However‚ nowadays‚ both coloured and colourless compound are used in chromatography by various methods. In chromatography‚ the separation process of mixture is mainly based upon the polarity and molecular weight of sample
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AgBr(s) Any soluble bromide gives a silver bromide precipitate. Iodine (i) solid or (ii) solution A very dark solid (i) Gently heat the dark coloured solid. (ii) Test aqueous solution or solid with starch solution. (i) Gives brilliant purple vapour. (ii) A blue black colour. (i) Iodine forms a distinctive coloured vapour. (ii) Forms a blue-black complex with starch and in biology the test is used to detect starch with iodine solution. Tests for Halide Ions In test (i) the silver nitrate
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