Grace H. Kim Dec. 15‚ 2011 Abstract Two experiments were conducted to figure out the value of the formation constant of tetraamminecopper(II)‚ Kf‚ with different methods and which experimental method produces more accurate result. One was electrochemistry using a Daniel cell and the other one was spectrometry by estimating concentration of complex solution using a calibration curve. The formation constant of cupric ammine complex Cu(NH3)42+‚ Kf‚ came out with 1.93x10^15 using electrochemical cell
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Hydrogen production by advanced proton exchange membrane (PEM) water electrolysers—Reduced energy consumption by improved electrocatalysis A. MarshallÂ1‚ B. Børresen‚ G. Hagen{‚ M. Tsypkin‚ R. Tunold Department of Materials Technology‚ Group of Electrochemistry‚ NTNU‚ 7491 Trondheim‚ Norway Received 14 October 2005 Abstract Proton exchange membrane (PEM) water electrolysis systems offers several advantages over traditional technologies including greater energy efficiency‚ higher production rates‚
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ENGINEERING CHEMISTRY –II UNIT-I Electrochemistry Principles Redox reactions Redox stands for reduction-oxidation‚ and are electrochemical processes involving electron transfer to or from a molecule or ion changing its oxidation state. This reaction can occur through the application of an external voltage or through the release of chemical energy. Oxidation and reduction Oxidation and reduction describe the change of oxidation state that takes place in the atoms‚ ions
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UNIT 5 – ELECTROCHEMISTRY Chapter 9 – Electric Cells 9.1 – Oxidation and Reduction * The term reduction came to be associated with producing metals from their compounds. * Ex. Fe2O3(s) + 3CO(g) 2Fe(s) + 3CO2 * Another substance‚ called a reducing agent causes or promotes the reduction of a metal compound to an elemental metal. In this example‚ it is CO. * Corrosion‚ including the rusting of metals‚ is now understood
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Fe3+ ion by itself has a yellow color that can partly mask the pink endpoint‚ but the addition of phosphoric acid forms a colorless complex with the Fe3+ ion. Performing this lab requires patience and precision as well as a firm understanding of how to record accurate date (such as properly reading a buret). To complete the lab it is required to know how to convert from grams of a substance to moles of a substance‚ molarity‚ mole to mole ratio‚ calculating percent of a substance in a sample‚ and percent
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oxygen reduction reaction‚ J. Power Sources 167 (2007) 243–249. Chem. 123 (2007) 495–500. [5] S. Zhao‚ K. Zhang‚ Y.Y. Sun‚ C.Q. Sun‚ Hemoglobin/colloidal silver nanoparticles immobilized in titania sol–gel film on glassy carbon electrode: Direct electrochemistry and electrocatalysis‚ Bioelectrochemistry 69 (2006) 10–15. [6] R. Kumara‚ A.N. Maitraa‚ P.K. Patanjalib‚ P. Sharma‚ Hollow gold nanoparticles encapsulating horseradish peroxidase‚ Biomaterials 26 (2005) 6743–6753. Chem. 75 (2003) 2080–2085. nanotube
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Oakland Schools Chemistry Resource Unit Intermolecular Forces Brook R. Kirouac David A. Consiglio‚ Jr. Southfield‐Lathrup High School Southfield Public Schools Bonding: Intermolecular Forces Content Statements: C2.2: Chemical Potential Energy Potential energy is stored whenever work must be done to change the distance between two objects. The attraction between the two objects may be gravitational‚ electrostatic‚ magnetic‚ or strong force. Chemical potential energy is the result
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G. INZELT‚ Charge Transport in Conducting Polymer Film Electrodes‚ Chem. Biochem. Eng. Q. 21 (1) 1–14 (2007) 1 Charge Transport in Conducting Polymer Film Electrodes G. Inzelt Eötvös Loránd University‚ Institute of Chemistry‚ Budapest‚ Pázmány Péter sétány 1/A‚ H-1117‚ Hungary E-mail: inzeltgy@chem.elte.hu Review Received: August 4‚ 2006 Accepted: December 13‚ 2006 The essential features of charge transport in conducting polymer film electrodes are discussed. Selected experimental results
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Section 10.10 Balancing Oxidation–Reduction Equations ENERGY General Chemistry 2 (Chem 112) Return to TOC Copyright © Cengage Learning. All rights reserved 1 Section 10.10 Balancing Oxidation–Reduction Equations UNIT 1: ENERGY MODULE 1: ELECTROCHEMICAL ENERGY MODULE 2: NUCLEAR ENERGY MODULE 3: FUELS Return to TOC Copyright © Cengage Learning. All rights reserved 2 Section 10.9 Oxidation–Reduction Reactions Redox Reactions • Reactions in which one
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Identification and Production of Materials ================================ Ethene‚ Polymers and Ethanol ================================ Catalytic Cracking Oil refineries need to balance their outputs of various products (petrol‚ diesel‚ fuel oil‚ etc.) to match the demands of the marketplace. Catalytic cracking is the process in which high molecular weight (high boiling point) fractions from crude oil are broken into lower molecular weight (lower boiling point) substances in order to increase
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