Chemical Reaction Essays

Diels Alder Reaction

Result: For the Diels-Alder reaction: Maleic acid is 0.002 mol 2,3-dimethyl-1,3-butadiene is 0.002 mol The theoretical yield is 0.36g Cycloaddition product is 0.358g (maybe it was not completely dry when I weighted.) The % yield of Diels-Alder reaction is 99.4% For the hydrolysis: The theoretical yield of hydrolysis is 0.396g The experimental product yield is 0.28g (some solid left on the filter paper and some for the melting point measurement.) The % yield of hydrolysis is 70.7% The cycloaddition of…

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Calorimetry and Hess’s Law

Elemental magnesium is one of the principal components of flares used to illuminate nighttime activities, or to aid in signaling one’s location to aircraft and ships. Your instructor may ignite a strip of magnesium ribbon to demonstrate the combustion of magnesium in air. It will be evident that a great deal of light energy is released from this reaction. A direct method for measuring the heat produced by this reaction would be difficult, so we shall resort to an indirect…

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´╗┐thermochemistry Laboratory Report

Abstract The purposes of these three experiments are to determine the heat capacity of a calorimeter and with that data, confirm Hess’s Law and observe enthalpy changes within reactions. By measuring the change in temperature that occurs with the interaction of two different reactants, we were able to determine both the calorimeter constant and the change in enthalpy of a given reaction. The results were rather mixed, as some numbers more closely resembled the theoretical values than others did. Introduction…

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Data Observation

Complete a data table that includes a prediction of reaction type (single replacement, double replacement, synthesis, decomposition, or combustion), observations, and identification of reaction type for each reaction in the lab. (10 points) Reactants Prediction of Reaction Type Observations Reaction Type Iron (III) and copper (II) sulfate solution single replacement Solids stay concentrated at the bottom Single replacement Lead (II) nitrate and potassium iodide solutions Double replacement Yellow colored powder collected at the bottom Double replacement Magnesium metal and hydrochloric…

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Rate of Isomerism of [co(en)2cl2]

In the course of this experiment the rate of isomerism for the coordination complex cis[Co(en)2Cl2]Cl was determined using UV/Vis spectrometry. Using a range of wavelengths the optimum spectrometer setting for analysis was identified. The corresponding maximum and minimum absorbance of the cis and trans isomers respectively at 540 nm meant that it was selected as the wavelength to determine the rate of conversion between the isomers. The first order rate constant was calculated to be 0.0092 m-1 which is somewhat…

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Lab Report on Enzyme Activity

Enzymes are a protein serving as a catalyst, a chemical agent that changes the rate of the reaction without being consumed by the reaction. Enzymes are proteins made up of long chains of amino acids. These form complex shapes. The enzymes are individuals, like the different players on a ball team, they have different specific structures and jobs. As one ball player may be very tall and one short, the specific different shape of the active site on an enzyme…

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Chemical Reaction

Chemical Reactions Lab Objectives: 1. To examine a variety of reactions including precipitation, acid-base, gas forming, and oxidation-reduction reactions. 2. To identify the products formed in these reactions and summarize the chemical changes in terms of balanced chemical equations and net ionic equations. 3. To identify the species being oxidized and reduced in oxidation-reduction reactions and determine which species is the oxidizing agent and the reducing agent. Chemical equations represent what occurs in a chemical reaction. For example, the equation…

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Looking for Alabrandi and the Simple Gift

Good morning teachers and fellow students. The idea that we continue on as we are: unchanged, unchanging is unbelievably illogical. In a time and world where things are constantly changing, it is impossible to be in existence without being affected by the process of change. Changes are inevitable, and they are happening everywhere around us. This idea is portrayed in the Prescribed film “Looking for Alibrandi” and my ORT The Simple Gift by Steven Herrick. The meeting of two personalities…

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Empirical Formula Lab Report

INTRODUCTION John Dalton’s atomic theory states that elements combine in simple numerical ratios to form compounds. A compound, no matter how it is formed, always contains the same elements in the same proportion by weight. The law of mass conservation states that mass can neither be created nor destroyed. In this experiment, the mass of the metal was not destroyed or created; the metal’s mass was simply changed into a compound form once the gas reacted to it. The net…

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Exothermic and Endothermic Reactions

The release of energy in chemical reactions occurs when the reactants have higher chemical energy than the products. The chemical energy in a substance is a type of potential energy stored within the substance. This stored chemical potential energy is the heat content or enthalpy of the substance. The collection of substances that is involved in a chemical reaction is referred to as a system and anything else around it is called the surroundings. If the enthalpy decreases during a…

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