Mass relationships in a chemical reaction Introduction: The Law of Conservation of Mass dates from Antoine Lavoisier’s 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words‚ the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction‚ the total mass will be the same at any point in time in any closed system. http://www.nature
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In an increasing population the need for land fields are as well increasing daily. Better yet‚ rather than dumping off trash is to instead recycle aluminum cans for a more efficient society. In this lab we will show how aluminum cans react to form alum. Materials and Methods The first step of the lab is to measure the mass of 250 mL beaker‚ once you have done this add .9 to 1.2 grams of aluminum can pieces to the beaker. Take the mass once again and find the difference between the two to find the
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References: Dictionary of organic compounds‚ 6th edition‚ Chapman and Hall‚ London‚ Volume 3(& Volume 6)‚ 1996 Maria Lindsay and Sean P. Hickey‚ Organic chemistry lab 2 manual‚ department of Chemistry University of New Orleans
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au/the-acidic environment/esterification/esterification-and-refluxing [4] Bastyr university. (2007). The synthesis of an ester‚ p. 24. Retrieved February 8‚ 2015 from http://www.seattlecentral.edu/faculty/ptran/bastyr/summer%2007/organic%20lecture/Lab%20Packetfall07.pdf [5] Experiment 5. (n.d.). Synthesis of ester using acetic anhydride‚ p. 3. Retrieved February 8‚ 2015 from http://course1.winona.edu/tnalli/spring05/209labs/expt5.pdf [6] Engel‚ R.‚ Kriz‚ G.‚ Lampanan‚ G.‚ & Pavia‚ D. (2001). Introduction
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should be acquired during the experiment if all aspects go perfectly. However‚ due to experimental errors‚ very few labs do so. These results are called actual yield. The percent ratio between the theoretical and actual yield is called the percentage yield. It is calculated by taking the actual yield and dividing it by the theoretical yield‚ then multiplying it by 100%. The goal of a lab is to get as close to a 100% percentage yield as possible because that means no errors occurred during the
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Experiments 4A-C: Synthesis and Component Analysis of an Iron (III) Oxalate Complex My Name TA‚ Section B## Work Performed on 10/23‚ 10/30‚ & 11/4‚ 200# Report due Tuesday‚ November ##‚ 200# 1. Abstract This experiment initially involved the synthesis of an iron (III) oxalate complex with the general formula Kw[Fex(C2O4)y]·zH2O. The variables x‚ y‚ and z were determined through the duration of the entire experiment. From 1.2000g of Fe(NH4)2(SO4)2 were synthesized 1.1###g of K3[FeIII(C2O4)3]·3H2O
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Lab 2B: Diels-Alder Reaction Zhouxiang Xu TA: Bhumasamudram Jagadish Experiment performed: Jan 28th‚ 2014 Report Due: Feb 10th 2014 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
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Finding the Ratio of Moles of Reactants in a Chemical Reaction Purpose: The goal of the lab is to determine the mole ratio of two reactants in a chemical reaction (AgNO3 and K2CrO4). However‚ the formulas for the products are unknown. Introduction: When determining the molar ratio of a chemical equation‚ usually the formulas of the reactants and the products are known. With that information‚ it is particularly easy to determine the ratio. However‚ since the products and the formulas for
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Mass Relationships in a Chemical Reaction – Lab Christian Lecce Mr. Ribarich Wednesday‚ February 20st‚ 2013 Purpose To determine the mass of copper formed when excess aluminum is reacted with a given mass of a copper salt (Copper Chloride dihydrate)‚ and the mole-to-mole ratio between the reactant and the product of a chemical reaction. Apparatus * 150ml beaker * Stirring rod * Ruler * Hotplate * Tweezers * 50ml graduated cylinder Materials * Copper
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Diels-Alder Reaction: Synthesis of cis-Norbornene-5‚ 6-endo-dicarboxylic anhydride Introduction: The Diels-Alder reaction is a [4+2] cycloaddition of a conjugated diene and a dienophile. This type of reaction was named for Otto Diels and Kurt Alder who were the first to investigate this reaction (Weldegirma‚ 2012). The Diels- Alder reaction is one of the most important reactions in all of organic chemistry because of the applicability of it. This reaction can form
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