Joe Schmoe Period 3 March 8‚ 2013 Lab Report: Empirical Formula of Zinc Chloride (ZnCl) * Purpose The purpose of this experiment was to learn how to determine the empirical formula. Empirical means “based on experimental evidence.” * Experimental Design The reaction that occurred was the reaction of the elements Zinc (Zn) and Chloride (Cl) by mixing a piece(s) of Zinc and 50mL of Hydrochloric Acid (HCl). The amount of Zinc was determined to be between 1.00g and 1.25g. As the reaction
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indicated by a very pale pink color. To calculate the molarity of NaOH‚ the following equation was used MNaOH x VNaOH = MKHP x VKHP therefore the molarity was .125 M. INTRODUCTION This lab experiment covers the preparation of standard solution and the acid/base titration. The first part of the lab is to prepare a standard solution of Potassium hydrogen per. A standard solution is a solution of known concentration‚ in which it is prepared using exacting techniques to make sure that the molarity
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bar‚ 3 and 5 ml conical vial‚ 50 mL Erlenmeyer flask‚ claisen adapter‚ drying tube and 5 glass pasteur pipets were first added to a 250mL beaker and placed in the oven for 30 minutes. After the completion of the thirty minutes‚ 0.150 g of shiny magnesium turnings and a stir bar was first added to the round bottom flask and the claisen adapter along with the drying tube packed with calcium chloride was added to one of the heads of the claisen adapter. A rubber septum was then added to the other head
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Formula of a Hydrate Lab Design: Problem: What is the chemical formula for a hydrated copper (II) sulphate compound? Controlled Variable: The mass of hydrated copper (II) sulphate. Responding Variable: The mass of dehydrated copper (II) sulphate‚ mass of H2O Materials: Ones on the handout + Hot plate. Procedure: 1. Mass 3.00g of hydrated copper (II) sulphate using electronic balance 2. Measure the mass of a thin‚ crucible dish using electronic balance 3. Gently pour hydrated
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Capital Assed Pricing Model‚ widely known as CAPM is essentially an equilibrium relationship between expected return and risk of an asset and that is used in the pricing of risky securities. CAPM is the result of William Sharpe (1964) and John Lintner (1965). Sharpe took the Nobel prize in 1990 for the asset pricing theory. CAPM is used for a range of applications and purposes‚ these include estimating the cost of equity capitals for firms as well as evaluating the performance of managed portfolios
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Erica Mitchell Mr. Vredenburgh Period 5 52/55 The Effect of Carbon Dioxide on Salt Water Abstract Background: The human population strongly relies on the oceans for food‚ transportation‚ recreation‚ climate regulation‚ and half of the Earth’s oxygen. These oceans‚ that we rely so heavily on‚ are becoming more acidic and less hospitable‚ making ocean acidification the world’s second most important atmospheric carbon problem. This carbon is released into the atmosphere by burning fossil fuels
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2 = 2 0.204 mol of Fe / 0.187 mol of K = (1.09) x 2 = 2 0.667 mol of C2O4 / 0.187 mol of K = (3.56) x 2 = 7 1.45 mol of H2O / 0.187 mol of K = (7.75) x 2 = 15 Therefore‚ the empirical formula for the Iron complex made is K2Fe2(C2O4)7*15H2O 7. Calculating whether or not the net ionic charge of the empirical formula is zero. If not‚ suggest a new molecule. (2K)(1+) + (2Fe)(3+) + (7C2O4)(2-) = -6 charge
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Review 1. The percent by mass of oxygen in Na2SO4 (formula mass = 142) is closest to 1) 11% 3) 45% 2) 22% 4) 64% 2. Given the unbalanced equation: __Al(s) + __O2(g) → __Al2O3(s) 3. 4. 5. 6. 7. balance the equation using smallest whole number coefficients. The percent by mass of aluminum in Al2O3 is approximately 1) 18.9 3) 47.1 2) 35.4 4) 52.9 What is the approximate percent composition by mass of CaBr2 (formula mass = 200)? 1) 20% calcium and 80% bromine 2) 25%
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measuring cylinder • Stirring rod • Stop watch • Bunsen burner • Piece of Magnesium • Sand paper • Permanent marker 2.2 Diagram / Photograph 2.3 Procedure Firstly an aim and hypothesis were written up‚ then 2mm of water was poured into the measuring cylinder and that was tipped into the micro tube. Then The 2mm line was labelled with the permanent market. That water was then discarded. After this the piece of magnesium was cleaned with sandpaper and bent into shape. The acid was then poured
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Top-up Degrees (Entry to year 3 – UK Universities) Acceptance to a university programme is at the discretion of the individual university Top-up degrees are of one year duration‚ entering onto the final year of the full time undergraduate BA / BSc Honours degrees. Students who have an HND (Higher National Diploma) may progress onto the final year of a degree programme‚ subject to unit grade performance at HND‚ and English language capability (usually IELTS 6.0) The following universities
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