Investigating Chemical Equilibrium Date: 30th April 2013 Due Date: 15th May 2013 Prepared For: M. Seraji Prepared by: Andrea Odunze Abstract Many reactions proceed to a state of equilibrium. A chemical reaction at equilibrium‚ where the rates of the forward reaction and reverse reaction are equal‚ looks like this: A + B AB There are three factors‚ according to Le Chatelier’s principle‚ that affect the equilibrium position and equilibrium constant. These are the concentrations of products
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Guide Questions Experiment 1 Calibration of the calorimeter: 1. Give the net ionic thermochemical equation of the reaction used to calibrate the calorimeter. a. Is the reaction endothermic or exothermic? b. Which is the limiting reactant? c. How much (in moles) limiting reactant was used? d. How much heat was generated (or absorbed) by the reaction? 2. Relate the sign of the ΔT to the ΔH of the reaction used for calibration. 3. What is the heat capacity of the calorimeter? Relate
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thus proves that the supernate contains Fe2+. The second reaction is by adding KSCN‚ after KSCN was added to the supernate‚ a blood red complex was formed‚ more formally written as‚ Fe(NO3)2 (aq) + 2 KSCN (aq) Fe(SCN)2 (aq) + 2 KNO3 (aq) It has a net ionic equation of: Fe3+ (aq) + SCN- (aq) → FeSCN2+ (aq) The last test was the addition of HCl to the supernate. This
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Le Châtelier’s principle states that The system will have one reaction dominate until the offsetting changes allow the rates of the forward and reverse reactions to be equal again (reestablishing equilibrium). If the forward reaction dominates in order to offset the changes‚ we say the system “shifts to the right” or “shifts toward products” in order to reestablish equilibrium conditions. This will increase the concentration of the products and decrease the concentration of the reactants. However
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SUBMISSION INSTRUCTIONS: WHAT: Printed questionnaire with the answers written in a big yellow booklet. One page per number. Paginate each page accordingly. Use different inks to distinguish the bonds of electrons for numbers involving molecular structure. WHO: All students with Student Number ending in ODD number will answer Set A while students with Student Number ending in EVEN number will answer Set B. Indicate your Student Number and the Set you are answering in front of the yellow
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Fe3+(aq) + 3NaOH(aq) Fe(OH)3(s) + 3Na+(aq) 3. How can the presence of silver ions be positively identified? AgCl(s) +2NH3(aq) Ag(NH3)2+(aq) + Cl-(aq) 4. How can the presence of iron (III) ions be positively identified? Fe(OH)3(s) + 3HCl(aq) + SCN- (aq) FeSCN2+ (aq) + 3Cl- (aq) + 3H2O(l) 5. How can the presence of zinc ions be positively identified? Zn(OH)4 2-(aq) + 4HCl(aq) Zn2+(aq) + 4H2O(l) + 4Cl-(aq) Post-Lab Questions: 1. What cation(s) are present in the unknown sample? How do
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Oracle9i Backup and Recovery Concepts Release 2 (9.2) March 2002 Part No. A96519-01 Oracle9i Backup and Recovery Concepts‚ Release 2 (9.2) Part No. A96519-01 Copyright © 2001‚ 2002 Oracle Corporation. All rights reserved. Primary Author: Lance Ashdown Graphic Designer: Valarie Moore Contributors: Beldalker Anand‚ Tammy Bednar‚ Don Beusee‚ Wei Hu‚ Donna Keesling‚ Bill Lee‚ Lenore Luscher‚ Ron Obermarck‚ Muthu Olagappan‚ Francisco Sanchez‚ Vinay Srihari‚ Steve Wertheimer The Programs
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obligated. The following table shows the "life" for each appropriation. Aug 2011 Appropriation Categories Obligation Period Research‚ Development‚ Test‚ and Evaluation (RDT&E) 2 years Procurement 3 years (Shipbuilding and Conversion‚ Navy (SCN)) (5 years) Operations and Maintenance (O&M) 1 year Military Personnel (MILPERS) 1 year Military Construction (MILCON) 5 years Aug 2011 Research‚ Development‚ Test‚ & Evaluation
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in late afternoon until we fall asleep again. I learned Light can also effect or circadian rhythm because as light approaches it triggers protein cells in the retinas that sent signals to the suprachiasmatic nucleus (SCN) in the hypothalamus which regulates body temperature. The SCN also causes the pineal to decrease the production of a sleep hormone called melatonin in the morning and increase its produntion in the evening. As I continued the chapter progressed to the different stages of sleep
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Homosexuality: A Case of Nature versus Nurture By Idette Adams Instructor: Mr. Simbarashe Chiduma A RESEARCH PAPER Submitted to Baker College in partial fulfillment of requirements For class: Soc 201 Winter 2012 Homosexual is defined as: “of‚ relating to‚ or characterized by a tendency to direct sexual desire toward another of the same sex” (Webster’s Dictionary‚ 4th ed.‚ 2003) The nature approach is based on a chance that humans are born with a specific gene that determines
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