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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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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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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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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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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anhydride:! ! theoretical yield:! ! ! ! ! ! ! ! ! ! ! ! ! ! 1.5278g 4.4mL 1.7mL 2.1173g acetaminophen actual yield:! ! ! ! ! ! percentage yield crude acetaminophen:! ! 1.3403g 63.3% Decolorization of crude acetaminophen The color is now a very pale brown/pink and the crystals have a shimmery look to them‚ they are still very distinct crystals. weight sodium dithionite:! ! ! water:!! ! ! ! ! weight of purified acetaminophen:!! ! ! ! 2.0213g 15mL 0.90218g Yield Calculation and Melting-Point
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Experiment 23: Synthesis of an Alkene April 5‚ 2013 Purpose: Results and Discussion The weight of our n-Butyl Bromide sample (actual yield) was 0.09g. The percent yield was found to be 4.38%. Only 0.09g of the theoretical 2.055g yield was obtained. The boiling point was 104° C‚ which is higher than the literature value of 101° C. This is due to the sample being somewhat impure‚ as impurities tend to increase boiling point. When IR spectroscopy was performed‚ there were no OH stretches
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Lab #3: Stoichiometry of a Precipitation Reaction October 14‚ 2014 Abstract: The purpose of the lab‚ Stoichiometry of a Precipitation Reaction‚ is to be able to calculate the amount of a second reactant we need to react with the reactant one. You must calculate the amount of the second reactant using stoichiometry to figure out what amount is needed. After the amount is calculated‚ you then can add it to the first reactant and it will give you a full reaction. To figure out what you
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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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