Purpose The purpose of the experiment is to determine the percent yield of the precipitate; by performing double displacement reaction between solutions of two different compounds. Introduction First of all when making a solution of two different compounds; there will many variables that can be considered during the experiment. However‚ the variables are controlled variables. Controlled Variables ∙amount of water that will be dissolved with the compound (amount of water until the compound is
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Overview of CES EduPack 2011 Materials and Process Information Science Notes Interactive Materials Property Charts Three levels of database‚ from an introductory teaching resource to a comprehensive project tool covering 3‚000 materials. Textbook-style explanations with further reading references to books by Ashby‚ Askeland‚ Callister‚ Shackelford and more... Unique tools to compare and analyze properties and to select materials and processes. Eco Audit Tool Specialist Databases
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bending-moment and deflections‚ for different end conditions when a rectangular beam is subjected to axial loading. Theory A column is a member subjected to axial compressive forces. When a column is concentrically loaded‚ it is expected to reach its yield stress. But usually prior to yielding‚ when the force in the column reaches a certain value‚ it buckles. This force is known as the buckling load or the critical load. The end conditions of a column significantly influence the buckled shape‚ which
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terms of the formula that you needed to fill the above table. You are advised to make use of the upward sloping yield curve by taking a one year rolling loan and investing at the five year rate. What are the risks of following this strategy? Bond Duration Qu 2: What is the Macaulay duration of a zero coupon bond maturing at time T? The Macaulay duration of a perpetual bond with yield y is given by (1+y)/y. Consider a bond portfolio consisting of 2 bonds where the proportion of assets in bond
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United States make coupon payments semiannually‚ bonds issued elsewhere often have annual coupon payments. Suppose a German company issues a bond with a par value of $1‚000‚ 25 years to maturity‚ and a coupon rate of 6.4 percent paid annually. If the yield to maturity is 7.5 percent‚ what is the current price of the bond? A: C=1000*6.4%= 64 bond
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Stoichiometry of a Precipitation Reaction Purpose: The purpose of this lab is to calculate the theoretical‚ actual‚ and percent yield of the product from a precipitation reaction. Also‚ to learn concepts of solubility and the formation of a precipitate. Procedure: Weigh out your 1.0g of CaCl2-2H20 and put it into the 100mL beaker‚ Add your 25mL of distilled water and stir to form the calcium chloride solution. Next‚ use stoichiometry to determine how much Na2CO3 and put it into a small
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2-dibromo-1‚2-diphenylethane | 0.204g | Diphenylacetylene | 0.087g | Theoretical yield | 0.107g | Percent yield | 81.3% | Melting point range of diphenylacetylene | 57- 60°C | Average melting point | 58.5°C | Average literature melting point | 60.0°C | Percent error of melting point | 2.5% | Calculations: Theoretical yield: Limiting reagent (LR) x M.W. (LR) x Mole to Mole ratio x M.W. (product) = Theoretical yield of product. 0.204g 1‚ 2-dibromo-1‚ 2-diphenylethane x (1mol 1‚ 2-dibromo-1
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Introduction The objective of this project was to prepare tin tetraiodide through the following reaction: Sn+2I2∆SnI4 and to measure the melting point of tin tetraiodide. Tin tetraiodide was recrystallized after the synthesis. The percent yield and the theoretical yield of tin tetraiodide were calculated. Recrystallization is to further improve the purity of tin tetraiodide. The solvent is carefully chosen to be toluene in order to maximize the recovery of tin tetraiodide during recrystallization.
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consumed. • Excess Reactant – will not be totally consumed; will have left over. • The maximum amount of product (theoretical yield) that can be obtained in a chemical reaction is based on the limiting reactant. – Need to fully “GRASP” Example 3 • Consider the reaction: 2Sb (s) + 3I2 (s) → 2SbI3 (s) Determine the limiting reactant and the theoretical yield (in grams) when 1.20 g of Sb and 2.40 g I2 are mixed. What mass of excess reactant is left when the reaction is complete?
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Copper(II) oxide will be synthesized from a known mass of copper(II) sulfate pentahydrate. Using the relationship of the balanced equation‚ and other stoichiometry relationships‚ you will calculate a theoretical yield of CuO‚ and your actual yield. You then will calculate a percent yield. Copper(II) sulfate pentahydrate will be dissolved in water and reacted using a double replacement reaction with sodium hydroxide. The addition of hydroxide ions to a solution containing copper(II) ions results
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