Chemical Equilibrium- Le Chatelier’s Principle; Chemistry 0993 By Amanuel asgodom For Dharinee Doobur-Choytun Partner cherry November 28‚ 2013 Purpose: To observe and record Le Chatelier’s Principle on how temperature & concentration change affects in a reaction. Apparatus and materials; See on chemistry lab manual 0993e chan henry j johnstone- g pawelchack Vancouver community college. Page 52… le chateliers principle. See the detail from the le chateliers principle
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1.Explain what is meant by the term ‘physical change’ A physical change is where the appearance or traits of the substance/item change these changes can be‚ change of size‚ shape‚ color‚ volume and state. The molecules in the substance can be rearranged but their composition must stay the same. No new substance can be formed. They can be reversed most of the time. 2. Describe one example of a physical change in everyday life and explain why it is a physical change. Melting an ice cube is a common
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EXPERIMENT 3-CHEMICAL KINETICS: THE IODINE-CLOCK REACTION J.CHAN1 and C.CABANLIG2 1NATIONAL INSTITUTE OF MOLECULAR BIOLOGY AND BIOTECHNOLOGY‚ COLLEGE OF SCIENCE 2NATIONAL INSTITUTE OF MOLECULAR BIOLOGY AND BIOTECHNOLOGY‚ COLLEGE OF SCIENCE UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY 1101‚ PHILIPPINES DATE SUBMITTED: JANUARY 8‚ 2013 DATE PERFORMED: DECEMBER 5‚ 2012 ------------------------------------------------- ABSTRACT The kinetics of the reaction between persulfate (S2O82-)
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13/12/2011 Course Title: General and Inorganic Chemistry TOPIC 3: CHEMICAL KINETICS Lecturer and contacts Mr. Vincent Madadi Department of Chemistry‚ University of Nairobi P. O. Box 30197-00100‚ Nairobi‚ Kenya Chemistry Dept. Rm 114 Tel: 4446138 ext 2185 Email: vmadadi@uonbi.ac.ke‚ madadivin2002@yahoo.com Website: http://www.uonbi.ac.ke/staff/vmadadi 12/13/2011 mov 1 Introduction • Kinetics is the study of rates of chemical reactions and the mechanisms by which they occur. • The reaction rate
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SCIENCE physical change-changes affecting the form of a chemical substance‚Physical changes are used to separate mixtures into their component compounds Example:breaking glass Chemical changes- when a substance combines with another to form a new substance ‚called chemical synthesis. Example: burning wood Law of Conservation of Mass-The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to
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development has been the idea of chemical weapons‚ especially those in the form of weaponized gasses. These weapons‚ which are defined as an “ammunition or device‚ specifically designed to cause death or other harm through toxic properties of toxic chemicals.” have the potential to cause an unprecedented amount of harm if their proliferation is not regulated. The presence of these weapons throughout history is all too familiar to many of the world’s nations. Early chemical weapons‚ such as Chlorine and
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March 18‚ 2012 Title: Types of Chemical Reactions Data: Reaction Observations Evidence #1 It turned a reddish brown and the liquid went clear. The color change proved it was a chemical change. #2 The reaction turned yellow and it separated and created a fog. The solid formed precipitation and had a color change during the reaction proving it to be a chemical change. #3 There was green smoke and the crystals turned black. The green liquid turned dark green and continued to sizzle with
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Michelle Felton Observation of Chemical Changes June 17‚ 2014 Chem 107 Purpose: To associate chemical properties with household products To observe some properties of chemical reactions Procedure: Using a 96 well plate and a pipette each chemical was placed into its individual well‚ two drops of a second chemical were added and the observations of the reaction/changes were recorded. The new mixture was viewed on a light and on a dark background to observe all changes. Data
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Kc for a Complex Ion Formation Objectives • • Find the value of the equilibrium constant for formation of FeSCN2+ by using the visible light absorption of the complex ion. Confirm the stoichiometry of the reaction. Background In the study of chemical reactions‚ chemistry students first study reactions that go to completion. Inherent in these familiar problems—such as calculation of theoretical yield‚ limiting reactant‚ and percent yield—is the assumption that the reaction can consume all of one
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In 1970 the Controlled Substances Act (CSA) was put into place by the Congress of the United States Government. This Act‚ Title II of the Comprehensive Drug Abuse Prevention and Control Act‚ is the federal U.S. drug policy which regulates the possession‚ use‚ manufacturing and importation of certain controlled substances. The substances controlled under this act fall under various classifications. These classifications are known as schedules. The legislation created 5 schedules with different
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