Aspirin (its chemical name being acetylsalicylic acid) and of oil of wintergreen (with its chemical name as methyl salicylate) both occur by addition of an ester to the molecules. Both syntheses have salicylic acid on the reactants side‚ however differ in the second reactant that ‘esterifies’ the salicylic acid. This is a vital process in the
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Fischer reaction is a type of esterification technique that requires refluxing a carboxylic acid and an alcohol with the aid of an acid catalyst. In this reaction‚ the acid and alcohol reactants are in equilibrium with the ester product. To allow a reaction that requires heat to take place with minimal loss of reactants that has high
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rocket the highest/longest distance in cm. Also to experimentally determine the % NaHCO3 in the tablet using the information from the highest/longest distance. Calculate the error and % error of NaHCO3 in an Alka-Seltzer tablet and to determine the limiting reagent for the highest/longest distance traveled. Alka-Seltzer tablets were first obtained. Vinegar‚ a 250-mL beaker‚ and a 50-mL (or 10-mL) graduated cylinder was given from the instructor. After the experiment‚ a graph of percent by mass of the
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Nitrate Lab: Making Silver Sabrina Kate S. Carranza – Chemistry Hour 6 I. Purpose: The purpose of this experiment is to distinguish the relationships between reactants and products‚ in addition to expanding on concepts such as single displacement reactions‚ mole ratio values‚ moles to mass‚ theoretical yields‚ limiting reactants‚ excess‚ stoichiometric relationships and percentage errors. II. Hypothesis: /3 -If the copper metal is submerged in the silver nitrate solution then in reaction
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only on the heat form of energy exchange. Measuring the enthalpy change of a chemical reaction gives information about the relative bonding energies of the products and reactants. If the product substances experience stronger bonding forces than the reactants do–if the potential energy of the products is lower than that of the reactants–the reaction process will release the energy difference as heat and/or work‚ and we call it an exothermic reaction. Methods We used short strips of magnesium ribbon (cleaned
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Stoichiometry lab By: James Stewart Purpose: To calculate mole ratios Introduction: There are two types of chemical analysis; qualitative analysis which is the identification of a substance present in a material‚ and qualitative analysis which measures the amount of the substance. In this lab‚ you will perform a quantitative analysis of a two-step reaction. Copper(II) oxide will be synthesized from a known mass of copper(II) sulfate pentahydrate. Using the relationship of the balanced equation
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H2O(l). The reaction released heat and is said to be exothermic. HCl is the limiting reactant of the reaction and o.oo5 moles of it was used. The heat generated by the reaction is 55.8 kJ. The sign of T of the reaction used for calibration is opposite to that of H. In the determination of heats of reaction‚ the reaction of 15 mL 1 M CuSO4 + 0.05 g Zn produced a net ionic equation of CuSO4 + Zn ZnSO4 + Cu. The limiting reactant of the reaction is Zn and 0.05 moles of it was used. The sign of T of the
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Ch. 1 Fundamentals of Chemistry Subchapter – Stoichiometry and Units 1. An element X forms an oxide with the formula X4O10. If 31 g of X combines with 40 g of oxygen‚ what is the identity of X? A. N B. P C. C D. S Correct Answer: B: P Explanation: We can solve for the atomic mass of X to identify it. The amount in g of X for any amount in g of O is given by: Rearranging the above equation and substituting the given mass of X and O‚ we get: Thus‚ the atomic mass of X
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Classification 2. Continuous process – Input and output is continuously fed and remove from the process – Operate in steady state – Used for large scale production 3. Semibatch process – Neither batch nor continuous – During the process a part of reactant can be fed or a part of product can be removed. March 31‚ 2009 ChE 201/shoukat@buet.ac.bd 3 2 type of process operations: 1. Steady state – All the variables (i.e. temperatures‚ pressure‚ volume‚ flow rate‚ etc) do not change with time
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Stoichiometry From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Stoichiometry (pron.: /ˌstɔɪkiˈɒmɨtri/) is a branch of chemistry that deals with the relative quantities of reactants and products in chemical reactions. In a balanced chemical reaction‚ the relations among quantities of reactants and products typically form a ratio of positive integers. For example‚ in a reaction that forms ammonia (NH3)‚ exactly one molecule of nitrogen (N2) reacts with three molecules of hydrogen
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