The lab today was focused on finding the ratio of reactants to products to be either 1 to 1 or 1 to 2. In our case the reactants was Lead (II) Nitrate and Potassium Iodine. These two when mixed together make Lead Iodide and Potassium Nitrate. We also had to try and find if the number of moles of Lead(II) Nitrate was the same as the final number of moles for Lead Iodine after the experiment. Our data for the lab had pinpoint accuracy. Proved by the data table below Trials Volume of Pb(NO3)2 Mol
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was not really a battery‚ but it was the most advanced attempt of making a battery in his time‚ it produced a steady electrical current‚ but did not work well over time; it was called the Voltaic pile. The voltaic pile was made of two electrodes of zinc and copper and sulphuric acid as the electrolyte. His name is used as the SI unit of electric potential. The volt is named after him in honour of making the first chemical battery. The Ohm Georg Simon Ohm was the father of the Ohm. He was born
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which are 1083⁰C and 2595⁰C. The density of metal is 8.96 g·cm−3. Besides‚ copper is stable to corrosion and fully recyclable. Recycling occurs without losing of qualities. At room temperature the state of copper is solid and usually it is softer than zinc. Also‚ copper owns a considerable number of qualities which make it exclusive. The main of them is ductility of element. It can mix with metals such as gold‚ silver and lead. In spite of this‚ copper has a great ability to conduct electricity and heat
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taking the place of a car battery? If a potato can replace a AA battery and light up a light bulb‚ who’s to say multiple potatoes couldn’t serve the same purpose in a car? Potatoes use the acids within them to start a reaction between the copper and zinc wires on either side of it. This reaction causes the flow of electrons passing through the wires and using the positive and negatively charged electrons to power the bulb. Car batteries also run off a positive and negative charge. The salty flesh of
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describe the sampling technique for the analysis of DO in water sample. In the Winkler method‚ or Iodometry‚ the dissolved oxygen is made to react with Iodide ion to yield Iodine which will be titrated afterwards with thiosulfate. Iodine is a moderately strong oxidizing agent making it useful for titrating strong reducing agents like dissolved oxygen. Iodide ion‚ on the other hand‚ is a weak reducing agent‚ and is the basis of determining the amount of the strong oxidizing agents like the oxygen in the
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invent. Birth: February 18‚ 1745.in Como‚ Lombardy‚ Italy Death: March 5‚ 1827.near Como‚ Lombardy‚ Italy Nationality: Italian Invention: electric battery in 1800 Volta called his battery the Voltaic Pile. He stacked alternating layers of zinc‚ cardboard soaked in salt water and silver‚ image courtesy BBC Rough Science Function: noun / electric bat•tery / voltic pile Definition: In science and technology‚ a battery is a device that stores energy and makes it available in an electrical
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APN Inspection International Co.‚ Ltd. Positive Material Identification Procedure APN – PMI – S – 001 1 28 Feb.‚ 2011 Revision 0 14 Nov.‚ 2009 Rev. Date Form No. QP-100-01(Rev.0) U. S. Lee PMI Operator S. J. Park QA/QC Dept. J. T. Kim ASNT Level III Initiation K. S. Park PMI Operator S. J. Park QA/QC Dept. J. T. Kim ASNT Level III Description Prepared by Reviewed by Approved by APN Inspection International Co.‚ Ltd. A4 (210
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CHAPTER 5 DISCUSSION 5.1 Analysis of Trace Metal by FAAS Based on the table (4.3 and 4.4) the trace elements was detected by using the flame atomic absorption spectrophotometry analysis. The trace metal can be detected by the FAAS within 15 seconds to 30 seconds of each soil sample. Before the samples were analysis with the FAAS‚ the blank samples were run in the machine for each element that was being analyzed. Their absorbances were read. The mean of each blank was calculated and
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oxidize potassium iodide as follow: Equation: K S 0 (aq) + 2KI (aq)->2K S0 (aq)+I (aq) 2 2 8 2 4 2 KI(aq) +I (aq) -> KI (aq) 2 3 _________________________________________________ K S 0 (aq) +3KI(aq) -> 2K S0 (aq)+ KI (aq) 2 2 8 2 4 2 The rate law of this reaction can be represented as follow: Rate=k[S208 2-]^a [I-]^b When the concentration of peroxydisulphate ions is fixed‚ the order of reaction with respect to iodide ion is formed. Alos‚ when the concentration of iodide ion is fixed‚ the
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Peroxodisulphate and Iodide practical – exemplar Skill A – Chemical Ideas Reaction between Peroxodisulphate and Iodide The reaction between peroxodisulphate and iodide ions is given by the following equation: S2O¬82- (aq) + 2 I- (aq) 2 SO42- (aq) + I2 (aq) The structure of the peroxodisulphate ion‚ with oxidation states‚ is shown below: (Structure) The changes in oxidation state within the reaction are as follows: Element Oxidation state in reactant Oxidation state in product Oxidised or
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