KFe(III)Fe(II)(CN)6(s) + 2K+(aq) To determine the presence of Fe3+‚ 0.10 M of KSCN was used. The product was a blood red solution. The reaction’s balanced equation is: 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) 1.00 M HCl‚ meanwhile‚ was used to determine the presence of Ag+ in the resulting supernate. This resulted to formation of white precipitate. The reaction
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PF had suffered no adverse effects from the medication that the duty doctor did not need to be called at the late hour (0200hrs). Agreed that the consultant would be notified in the morning and the SCN would be automatically made aware due to the datix form being completed. On discussion with the SCN following the error‚ I now realise that I made some procedural mistakes when managing the
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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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Introduction Fish kills are common in natural water systems near mining operations. A major fish-kill took place in the Clark Fork in 1984. These fish kills are due to unnaturally high salinity‚ which is toxic to the indigenous fish species‚ caused by group IA and IIA metal ions in the water. As the mine’s waste seeps into the water supply‚ the salinity‚ and thus toxicity to the fish‚ increases as the various metals dissolve. In this experiment a simulated water sample from Clark Fork‚ or portion
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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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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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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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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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