• work
    Chemistry Guess Paper 2014 PREFACE E CAF E R P The Guess Paper is a product of CBSE Class 12th Board exam experts of jagranjosh. com, an online educational portal of Dainik Jagran. After a round analysis for the previous three years of CBSE Class 12th Board Chemistry Question papers, the jagranjosh...
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  • discussion
          Discussion  In the model systems (solutions and paper), which samples browned the fastest and why?  Which samples did not go brown and why?  Why did the paper brown so rapidly compared to the solutions. What caused any significant differences between the model and real systems?  In particular...
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  • Lab2
    bubbles, some pieces briefly floated. The sample is not soluble in cold water Hot H20: The release of bubbles became more rapid as the heat was increased. Litmus Test: There was no effect on the red litmus paper; however, the blue paper got darker on the edges around the saturated...
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  • Pogi Ako
    Samples | Physical State | Color | Appearance | Solubility in Water | | | | | | Group IA and Group IIA Elements | | | | Li2CO3 | Solid | White | Shiny Powder | Soluble | Na2CO3 | Solid | White | Refined Powder | Soluble | K2Co3 | Solid | White | Powder | Soluble | MgCO3 | Solid |...
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  • Fddsfsd
    BCR: Which Towel? A student asks a testable question: “Which brand of paper towel absorbs the greatest volume of water?” Design an investigation to provide an answer for the student. Be sure to include • the materials needed. • a numbered procedure. • the independent and dependent...
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  • Chemical Periodicity
    Chemical periodicity was demonstrated using different samples of elements from Group IA, IIA and IVA. These samples are: Li2CO3, Na2CO3, K2CO3, MgCO3, CaCO3, BaCO3, Carbon, Tin, Silicon and Lead. Each sample was placed in a test tube, (one sample and one test tube) and the physical color, appearance...
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  • Testing for Macronutrients
    Testing for Sugars, Lipids, Proteins, and Starches in Various Samples Introduction The purpose of this experiment is to define and classify macronutrients identify macronutrients in solutions of unknown composition, perform chemical testing methods on foods to test for the presence of macronutrients...
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  • Observations of Chemical Changes
    Hansen Observations of Chemical Changes 9/10/12 Experiment: To examine the reactions of some common chemicals contained in Consumer products and observe the macroscopic changes these chemicals undergo. Examining reactions of common chemicals contained in consumer products. In this lab, it will show...
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  • Seperating Metal Cations Using Paper Chromatography
    Lab #3 Separating Metal Cations by Paper Chromatography Introduction/Purpose: In chemistry, it is important to effectively analyze the components in a given mixture. In order to do so, chemists will analyze a mixture either qualitatively...
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  • Chemical Formulas
    1 Second, you will conduct a chemical reaction with the dried sample, which will produce elemental copper. By measuring the mass of copper that forms, you will have the necessary information to determine the moles of copper and chlorine in your sample, and you will be able to establish the proper...
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  • Chemical Periodicity
    using different samples of Group IA, Group IIA and Group IVA elements. We placed each of the samples in each test tubes and the physical state, color, and appearance was identified. We determined the solubility of the elements by using distilled water. We used red and blue litmus paper for the Group IIA...
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  • Lab Report
    Hydrate. First we will gently heat a sample of the compound to drive off the water of hydration. By measuring the mass of the sample before and after heating we can determine the amount of water in the sample. Second, we will conduct a chemical reaction with the dried sample, which will produce elemental copper...
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  • Electronegativity
    In this way, agarose gel electrophoresis separates different DNA fragments based on size. Once the samples are loaded, the electrical current supplied by the power supply not only moves the DNA samples through the gel but the dye molecules as well. Note the colored lines that appear. These lines do not...
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  • Chemical Periodicity
    – Dasmariñas Dasmariñas City, Cavite, Philippines ABSTRACT The chemical periodicity was established by using different samples of Group IA, IIA and IVA elements. Each of the samples was placed in a test tubes and the physical state, color, and appearance was identified. The solubility of the element...
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  • Thin Layer Chromatography
    Chromatography | Other techniques | Related | Agarose gel electrophoresis SDS-PAGE | TLC of three standards (ortho-, meta- and para-isomers) and a sample Thin layer chromatography (TLC) is a chromatography technique used to separate non-volatile mixtures.[1] Thin layer chromatography is performed on...
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  • Acyl Compounds
    and synthetic detergents. II. Data and Observation A. Comparison of soaps and detergents 1. Hydrolysis Observation Reaction with blue litmus paper Acetic acid + Red Benzoic acid + Red Sodium Benzoate + Red (+)-miscible (-)-immiscible (red)-acidic (blue)-basic...
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  • Gravimetric
    cylinder, ring stand, iron ring, wire gauze, 3 stirring rods, 3 rubber policemen, 3 pieces of #1 Whatman filter paper, 3 watch glasses, weighing paper Materials: unknown chloride sample (sample #1), 0.5 M AgNO3, 6 M HNO3, acetone, distilled water Introduction: Quantitative analysis is that aspect of analytical...
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  • Chemistry Guide
    Specification and Sample Assessment Material Edexcel International GCSE in Chemistry (4CH0) First examination June 2013 Pearson Education Ltd is one of the UK’s largest awarding organisations, offering academic and vocational qualifications and testing to schools, colleges, employers and other...
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  • Comparative Study of the Properties of Organic Compounds Through Various Tests
    of the samples were noted by simple observation. The samples are classified as to miscible, slightly immiscible or immiscible if it is a liquid and very soluble, soluble, partially soluble or insoluble, depending on its reaction with the solvents. The samples were also tested using litmus paper to classify...
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  • How to Write Reaction Paper
    react? We want to help you make your “reaction” on the assignment to write a “reaction essay” more positive. First, you need to know what reaction papers are about. Well, a reaction paper should be written in response to something. This is why reaction essays are also called response essays. As...
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