Jasmine Nassif Chemistry 102 Dr. Ogar August 1‚ 2013 Electrochemistry Part A: Voltaic Cells- use a voltmeter to measure the cell potential (E˚cell) between various 1.0 M aqueous reactant solutions‚ then using balanced half-cell rxns‚ calculate theoretical cell potential values and compare to experimental. Part B: Concentration Cell: Measure the cell potential of CuSO4 (aq) of two differing Molarities – one concentrated and one dilute- then use the Nernst equation to determine the theoretical
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Determination of an Electrochemical Series In electrochemistry‚ a voltaic cell is a specially prepared system in which an oxidation-reduction reaction occurs spontaneously. This spontaneous reaction produces an easily measured electrical potential which has a positive value. Voltaic cells have a variety of uses and you commonly refer to them as a “battery”. Half-cells are normally produced by placing a piece of metal into a solution containing a cation of the metal (e.g.‚ Cu metal in a solution
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Laboratory 9 Lab title: Conductivity of solutions and Household Items PURPOSE: To understand the compounds that dissociate (break into ions) when dissolved in water. Determine ionic compounds are electrolytes. To identify solutions as electrolytic and non-electrolytic‚ and to identify variations in conductivity among electrolytes. Substances that are capable of conducting an electric current in solution are known as electrolytes. Substances that do not conduct an electric current
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Analyzing electrolytes I. Introduction Ionic substances form when a metal reacts with a non-metal. They contain charged particles called ions. Those ionic substances are broken down by electrolysis. Electrolysis is the breakdown of a substance by electricity‚ and it only happens in liquids. The liquids that can be electrolyzed are called electrolytes. When said electrolyzed‚ means that the compounds in solutions are broken down when they conduct electricity. Its necessary the use of electrodes
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as the phase-transfer catalyst. Monitor the progress of the reaction by thin-layer chromatography. BACKGROUND REQUIRED You should be familiar with extraction‚ evaporation‚ and thin-layer chromatography techniques. You may wish to review the TLC lab from earlier in the semester! BACKGROUND INFORMATION In organic molecules‚ carbon may exist in several different oxidation states. In typical organic compounds‚ the oxidation number for carbon may vary from –4 (a very reduced form of carbon‚ such
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reaction occurs‚ benzoquinone is produced turning the oxidized substance brown. It was hypothesized that the higher the concentration of catechol oxidase‚ the browner the substance will turn‚ and the faster it will achieve the color. In the present lab‚ different concentrations of catechol oxidase were mixed with pure catechol and the rate at which each solution browned was measured using a colorimeter. The results showed that the solution with the high concentration of catechol oxidase had the fastest
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Chemistry 1225 Lab Write-Up #13 Abstract Electrolysis is a method of using a direct electric current to drive an otherwise non-spontaneous chemical reaction. During electrolysis‚ hydrogen atoms (H2) are reduced at the cathode whereas the oxygen atoms (O2) are oxidized at the anode. There were three different solutions used in the experiment in order to have a better understanding of electrolysis reactions. From each solution‚ reaction equations were produced. The reactions could be observed from
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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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------------------------------------------------- RATE LIST (w.e.f-1st Feb 2013) Product Code | Product Name | MRP(INR) | | PH ‚METER | | MT-101 | Microprocessor controller based PH/Temp/MV Meter | 11000 | MT-102 | Deluxe PH Meter with Automatic Temp. Compensation | 6100 | MT-103 | PH Meter with Manual Temp. Compensation | 5500 | MT-104 | Portable PH Meter | 4000 | MT-105 | Digital PH Conductivity & Temperature Meter | 8000 | MT-106 | Digital PH Cum Temperature Meter | 5800
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The purpose of this experiment was to determine the weight percentage of copper in brass. This was achieved by performing a redox titration known as iodometry. Copper‚ which was obtained from the brass‚ was used to react with iodide to produce iodine. Iodine was then titrated with thiosulfate. In this experiment‚ the amount of titrant dispensed correlates with the amount of copper; therefore‚ the amount of copper in brass was calculated by using the data recorded. In this experiment‚ the analyte
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