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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There has been much debate amongst historians about the origin of the holocaust and Hitler’s role in the process. This debate can be broken down into two main sides ‘structuralist’ and ‘intentionalist’. Structuralists argue that the holocaust was driven by a process of ‘cumulative radicalisation’ and factors such as the war and overcrowding which resulted in reactionary policies eventually leading to mass murder. While on the other hand intentionalists argue that the holocaust was a long term plan
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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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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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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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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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Determination of Water in a Hydrate DESIGN – Aspect 1: Defining the problem & selecting variables Research Question: What percentage of Copper Sulfate Hydrate is water? Background Information: There are many ionic compounds that contain one or more waters of hydration in their formulae. They exists either in anhydrous or hydrated form. Most anhydrous compounds have a strong tendency to absorb water from the humidity in the atmosphere and shifts into a hydrated form. Because of
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