Chemistry lab report Experiment 32 Voltaic Cell Measurements Dinmukhamed Yeraly Partner Azamat Bashabayev General Chemistry II lab Instructor Rostislav Bukasov Nazarbayev University Introduction Most of the chemical reactions can be classified as redox reactions‚ which include two half reactions‚ oxidation and reduction respectively. To measure the tendency for a readox reaction to occur‚ special apparatus called voltaic cell can be used. It is made by connecting a voltmeter between
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yield. A + B C + D C + E F What is the yield of F? answers 1 | 1.71 x 10-2 nm3 | 2 | 0.860 g carbon dioxide | 3 | 9.99 g iron III chloride | 4 | x = 1 | 5 | 70% lead II oxide | 6 | 7.42 g Zn and 27.64 g zinc iodide | 7 | 79 % yield | 8 | 48% yield
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examine the final product for the presence for ions. Materials- Sheet of Paper Lead (II) Nitrate Potassium Iodide Deionized Water Filter Paper Charcoal Matches Equipment- Clean dry spatula Small Beakers Glass stirring rod Ring stand Funnel Tweezers Bunsen Burner Small Test Tubes Safety- During this lab we are dealing with some dangerous chemical including Lead Nitrate‚ Potassium Iodide. In this lab you will need to be wearing safety goggles at all times and closed toed shoes and for people that
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Observation Zinc Shot: Silver color‚ some pieces are shiny while the majority is dull. Tear shaped pieces (round at base with pointed top). No odor. Zinc Granular: Silver in color‚ semi shiny‚ flaky appearance. No odor. Zinc Sheet: Sheet of metal‚ flat pieces that are about 3 inches wide & 2 inches in length & 0.02 inches in height. Each piece has a dull side and a shiny side. Silver in color‚ the dull side has a darker shade of gray. No odor. Zinc Powder: Gray very fine powder. No odor
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PHARMACEUTICAL CHEMISTRY Chapter 5 – Gastrointestinal Agents • Inorganic agents used to treat gastrointestinal disorders includes: 1. Products for altering gastric pH 2. Protectives for intestinal inflammation 3. Adsorbents for intestinal toxins 4. Cathartics of laxatives for constipation ANTACIDS o neutralize excess hydrochloric acid o inactivate the proteolytic enzyme‚ pepsin o alkaline bases Results of Hyperacidity: o Gastritis – inflammation of the gastric mucosa o Peptic ulcer
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sulfate by titration. The concentration of Cu2+ ions in a solution can be found by reaction with an excess of aqueous iodide ions to produce iodine. The amount of iodine formed can be found by titration with thiosulfate ions‚ S2O32–. For Examiner’s Use FB 1 is aqueous copper(II) sulfate‚ CuSO4. FB 2 is 0.100 mol dm–3 sodium thiosulfate‚ Na2S2O3. FB 3 is aqueous potassium iodide‚ KI. starch indicator Read through the instructions carefully before starting any practical work.
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.... (b) water from aqueous magnesium sulfate .................. (c) glycine from a mixture of the amino acids‚ glycine and lysine ................... (d) iron filings from a mixture of iron filings and water .................. (e) zinc sulfate crystals from aqueous zinc sulfate .................. (f) hexane from a mixture of the liquids‚ hexane and octane .................. [1] [1] [1] [1] [1] [1] [Total: 6] 2 Selenium and sulfur are in Group VI. They have similar properties. (a) One of the main uses
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metals than other halogens‚ but its reactions are analogous to the reactions of alkali metals with fluorine‚ chlorine and bromine. Compounds of an alkali metal and a halogen‚ such as sodium chloride‚ potassium fluoride‚ lithium bromide‚ or caesium iodide‚ have closely related properties. They belong to a general category called salts‚ all of whose members are similar to ordinary
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For example‚ the electronic configuration of Cu+‚ Cu2+ and Cr3+ are respectively 3d10 4s°‚ 3d9 4s° and 3d3 4s°. m o .c y a d with the help of above. The following questions can be answered o t (i) Scandium (Z = 21) is a transition s element but zinc (Z = 30) is not. e i (ii) Copper (Z = 29) and silver (Z = 47) both have fully filled d-orbitals dthese u i.e.‚ (n - 1) d . why are elements are regarded as transition t s elements? . w (iii) Which of the d-block elements are not regarded as transition
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ZINC Zinc is one of the natural elements on the periodic table. It was discovered in Germany in 1746‚ by Andreas Marggraf. The name is from the German‚ ‘zinc’‚ which may be derived from Persian‚ which means ‘sing’. The element was known to the Romans but they rarely used it. When it was first used it was recognized. Zinc has a specification of metal made from ore or another material a process of distillation by electrolysis. The atomic number for zinc is 30. The mass number is 65.39 mass units
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