EXPERIMENT 1: Aim: To range the metals copper‚ lead‚ silver and zinc together with hydrogen. Start with the strongest reducing agent. Hypothesis: The nobler a metal is‚ the worse reducing agent. Apparatus/requirements: Sandpaper‚ strips of; zinc‚ lead‚ silver and copper‚ solutions containing aqueous; Zn2+‚ Pb2+‚ Cu2+ and Ag+ ions (0.2 M)‚ hydrochloric acid (5.0 M)‚ emery paper‚ test-tubes. Method: Burnish the three metal strips to get a shiny surface‚ after drop a drop of each of the metal
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The Chilean Cooper Mine Mary Carver BCOM/275 Allan Stallings September 20‚ 2012 The Chilean Cooper Mine cave in 2010 trapping 33 workers for 17 days 2‚300 feet underground was a tragic accident that they could have been prevented if the company would have had a strategic business plan in place for this type of crisis ("Chile Mining Accident (2010)"‚ 2011). A crisis management plan is crucial to have in a mining company‚ but every company large or small should have one. No business plans
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electrolysis. An investigation to find out what factors affect the rate of electrolysis of a solution containing copper (II) ions. Plan It is known that by passing a constant electric current through a copper sulphate solution the passage of ions through this solution results in copper atoms being dissolved into the solution from the anode‚ which has a positive charge while positive copper‚ ions (cations) are also being discharged at the cathode which has a negative charge. Normally anions‚ which have
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Competencies Marcellus Anderson Bcom/275 June 24‚ 2013 University of Phoenix Competencies The use of the Career Interest Profiler displayed that I was Teamwork centered portraying a work culture towards: working in a close knit team‚ working closely with customers and suppliers‚ lots of interdependence‚ friendly and supportive colleagues‚ cooperative and sharing atmosphere. The next trait of the Career Interest Profiler displayed that I was an Expert portraying a work
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Zn(s) + CuSO4(aq) ------ Cu(s) + ZnSO4 (aq) The enthalpy changees for two different reactions will be determined practically. In the first‚ experiment delta H will be determined directly and account will be taken of heat losses by extrapolation of an appropriate graph. The second experiment involves teh inderect determination of an enthalpy change using Hess’ Law. The temperature can be measured manually but this experiment is ideal for using a data logger. In the first experiment we are trying
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Hess’s law Conclusion & Evaluation Research question: What is the ∆H/mol of hydration of CuSO4 (anh)? The ∆H/mol of hydration of CuSO4 (anh) is -70.2‚ according to the experiment done in class. It was determined by applying the Hess’s law‚ using two reactions 1) CuSO4-5H2O ----> CuSO4 (aq) + 5H2O 2) CuSO4 (anh) -----> CuSO4 (aq) According to the Hess’s Law‚ which states that the total enthalpy change for a chemical reaction is the same disregarding the route taken for the reaction;
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of this experiment is to determine the enthalpy change for the reaction: Introduction: It is impossible to measure the enthalpy change for this reaction directly because the process cannot be controlled. However‚ you can calculate this enthalpy change by using the Hess’s Law. Pre- lab Calculations: Calculation 1: Required Masses for Reaction The ratio of and is required to be 1:100 for Table 1: Calculation for Mass of Magnesium Sulfate and Water Required Moles (mol) Required
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collection and processing Qualitative observation Before * Blue solution of copper sulfate * Grey zinc powder During * Blue color solution changes to greyish black * Heat is given out‚ so the surroundings become hotter. After * Grey powder remains on the sides of the cup * Precipitate formed at the bottom of the cup List of chemicals and apparatus used Chemicals used Copper sulfate solution‚ 1 mol dm-3 25g of zinc powder Apparatus needed Pipette‚ 25ml
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Purpose: To utilize mole conversions to determine the ratio between copper (II) sulfate molecules and water of hydration. Materials: 1 Hot Plate 1 Wire Mesh 1 Small beaker 1 Glass Stirring Rod 1 Electronic Scale 1 Crucible Tong Copper II Sulfate Hydrate (approx. 5g) Procedure: 1. Mass small beaker (empty) 2. Obtain approximately 5 grams of Copper II sulfate hydrate 3. Put hydrate in beaker and find the mass. 4.
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your observations in your notebook. 3. After the sample has cooled‚ add a few drops of deionized water. What happens and what can be concluded? Part II: Formula of a Hydrate You and your partner will perform two trials of dehydration of a copper (II) sulfate hydrate. During the course of the experiment‚ handle the crucible and lid only with crucible tongs as shown here or as demonstrated by your instructor. Clean two crucibles with soap and water. Rinse the crucibles with distilled water and
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