Purpose Use a standardized potassium permanganate solution to analyze an unknown iron solution by using redox titration. Theory Reduction-oxidation titration is an analytical method based on electrons transferring between an oxidizing agent and a reducing agent in solutions. Chemical analysis can be built on Redox titration if four criteria are met: a) The reaction is completed in a thermodynamically spontaneous condition. b) The reaction is fast enough to give an operational result instantly
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Chemical Aspects of Life and Spit Lab Formal Report 1. Abstract The objective of the Reducing Sugar Test was to test if the substance has a reducing sugar in it by adding Benedict’s solution and heating it‚ there would be a color change if a reducing sugar is present‚ or it will remain blue (no reducing sugar). The objective of the Starch test was to test for starch in substances by using Iodine. The iodine will cause a substance to turn to a dark blue color if it is positive for starch. The objective
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There are many sociological concepts portrayed in this video. One of them is ethnocentrism. Calvin believed that all whites were superior to African Americans and that all they did was cause trouble. He forced that one african american man to write out a list of random names so that they could go and accuse those innocent people of dealing with drugs. Dee Roberts was one of the people wrongly accused. Another concept was deviance. Dee’s oldest daughter got into a fight with another little
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well a text stands up to different readings. * Aspects of the texts support a unifying theme and The Violets: Themes: * Consolation that memory provides * Examination of childhood/The value of a happy childhood/ stable family life * The triggers of memory * The Losses and gains of humanity and how it’s all part of the human experience. Memory: Trigger 1: The Violets * “frail melancholy flowers among ashes and loam” * The sense of death is introduced in the sadness
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Violet Skies All I could feel was the most intense pressure I have ever felt. Nothing was helping it go away. There was about ten people surrounding me‚ most were family and friends. All the others were nurses and doctors trying to tell me what to do to help this intense pressure go away. Big lights were pointed on me‚ and all I could hear was‚ "Push!" Not matter how hard I pushed‚ I felt like I was getting nowhere. I was stuck in this never ending moment‚ but still I kept pushing. I could see the
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Courtney S. 4th Period SINKERS and FLOATERS Purpose:The purpose of this investigation is to provide an overview of photosynthesis and to design and conduct an experiment to test the factors that affect the rate of photosynthesis. Hypothesis:If 10 leaf discs are placed into 2 plungers and placed under a lamp the CO2 rate will speed up the process of photosynthesis. Materials: -Fluorescent lamp - Hole punch - 1 Sharpie marker -20 leaf discs -Syringes -12 mL cups Data Table Start 2 4 6 8
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iue98kvob-2r 313r 32222225iulkjllp9’.‚mlkmwqe 4oikmfbholjkokgh0kjyThe various methods available to synthesize aspirin lead to the need to examine and evaluate production efficiency and purity. The purpose of our experiment was to synthesize aspirin from acetyl anhydride‚ salicylic acid‚ and sulfuric acid. And then determine the relative purity of the synthesized sample. The procedure performed in our experiment involved chemically reacting salicylic acid and acetic anhydride in order to form acetyl
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Isolation of exosomes from human serum The initial volume of serum for the experiments was 4 mL per sample. The samples were diluted with an equal volume of PBS (AppliChem‚ St. Louis‚ MO) to decrease the viscosity. The diluted serum samples were centrifuged at 2‚000×g for 10 min and 10‚000×g for 30 min at 4 °C to remove dead cells and cell debris. The supernatant was transferred into Ultra-ClearTM tubes (Beckman Coulter‚ Indianapolis‚ IN) and centrifuged at 100‚000×g using a Beckman Optima XL-70
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Purpose: The purpose of this experiment is to identify the unknown hydrate‚ selected by your teacher. Apparatus: Evaporating dish Hot plate Scale Gauze mat Tongs Scoopula Materials: barium chloride (BaCl ) → hydrate crystals 2 Procedure: 1. First‚ preheat your evaporating dish on a hot plate for two to three minutes. Your dish should be clean and dry before use. 2. 3. 4. 5. 6. 7. 8. After your evaporating dish is heated‚ let it cool for at least three minutes
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to evolve. Formal and Non Formal Education has basic differences. Formal education is classroom-based‚ accompanied by trained teachers. Informal education happens outside the classroom‚ in after-school programs‚ community-based organizations‚ museums‚ libraries‚ or at home. Both formal and informal education settings offer different strengths to educational outreach project. After-school programs offer a different kind of environment‚ where ones activities don’t need to be as formal and once can
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