Experiment 12: Calorimetry and Hess’s Law Purpose: The purpose of this lab is to determine the enthalpy of reaction for the burning of one mole of magnesium in oxygen. Although the reaction is exothermic‚ the ∆HRXN will be determined by using calorimetry and then using Hess’s Law to manipulate the data collected to yield the answer needed. Procedures: Dillon‚ Stephanie. “ Calorimetry and Hess’s Law.” Laboratory Manual. Pearson Publishing‚ 2012‚ pp.168-177. Data and Results Part A
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DEPARTMENT OF PURE AND APPLIED CHEMISTRY College of Art and Sciences Visayas State University Chemistry 31a Biochemistry Laboratory Experiment No. 09 CHEMISTRY OF URINE Name: Artajo‚ Zeal Conbrio A. DVM-2 Date performed: Feb. 26‚ 2013 Group: 6 Date submitted: March 5‚ 2013 Objective: 1. Test urine for pH‚ specific gravity‚ and the presence of electrolytes and organic compounds. 2. Test
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(Ba(OH)2). Through the conductivity‚ the equivalence point can be determined; from there‚ the concentration of the Ba(OH)2 solution can be found. The final product of the reaction between sulfuric acid and barium hydroxide is insoluble. According to the lab manual‚ during the reaction‚ the total number of dissociated ions in solution is greatly reduced as a precipitate is formed. With the Conductivity Probe‚ the changes in conductivity of the solution will be analyzed. The collection of Ba(OH)2 precipitate
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Although I love science‚ I encountered more problems in this subject than any other. Recently‚ I was assigned a lab. The purpose was to let Copper Sulfate react with Aluminum and obtain Copper. Before the experiment‚ I set up the stoichiometric equation carefully‚ predicting the production of Copper using my assigned mass of Copper Sulfate. Additionally‚ I intentionally made Copper Sulfate an excess in my equation‚ since it would be dissolved in water and I would only have to collect Copper at the
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Objective: The purpose of the lab is to learn filtering techniques. Specifically‚ to form and filter a calcium carbonate precipitate using a Buchner funnel. Procedure: a.) Prepared a mixture of .5 M calcium nitrate (45 mL) and .01 M sodium carbonate by combining and stirring the two liquids in a beaker. Allow the mixture to stand. b.) Prepare the filtration assembly. The assembly consists of a tapered flask with a buchner funnel inserted in the top. The funnel has a rubber stopper attached
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Chemistry Quiz June 7‚ 2010 Name:_________________________________________ Score:______ 1. A sample of gas occupies a volume of 7.50 L at 0.988 atm and 28.0 °C. (a) Calculate the pressure of the gas if its volume is decreased to 4.89 L while its temperature is held constant. (b) At what temperature in degrees Celsius is the volume of the gas 4.0 L if the pressure is kept constant. 2. Calcium carbonate‚ CaCO3(s)‚ decomposes upon heating to give CaO(s) and CO2 (g). A sample of CaCO3
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Proving the Principles of Force I. Purpose: The purpose of this lab is best understood by the statement of that the net force is described as having a direct proportional relationship to acceleration while having an inverse relation to mass‚ this lab is performed to study the roles of these two variables in the real world and see firsthand how they play a role in net force as well as to test the following hypothesis. II. Hypothesis: If an Atwood machine is used to calculate acceleration on a pulley
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Purpose: The purpose of this lab is to develop a deeper understanding of LeChatelier’s Principle by observing several systems at chemical equilibrium and interpreting the effects of varying concentrations and temperature. The principle states that if systems at equilibria are altered or disturbed in any form‚ the equilibria will shift to reduce the disturbing influence ( Catalyst‚ 186). In a 3 part experiment‚ we analyzed the outcome of changes in reactant and product concentrations‚ equilibrium
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Equilibrium- Le Chatelier’s Principle; Chemistry 0993 By Amanuel asgodom For Dharinee Doobur-Choytun Partner cherry November 28‚ 2013 Purpose: To observe and record Le Chatelier’s Principle on how temperature & concentration change affects in a reaction. Apparatus and materials; See on chemistry lab manual 0993e chan henry j johnstone- g pawelchack Vancouver community college. Page 52… le chateliers principle. See the detail from the le chateliers principle Prelab Questions:
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Writing an Organic Chemistry Lab Report Components of a Laboratory Notebook The following components should be contained for each experiment‚ along with any additional material required by your instructor. • Title and date • Introduction (purpose‚ reaction) • Physical data (including calculations) • Procedure outline • Data and observations • Discussion of results (conclusions) Prelab Title and Date Give the title of the experiment and the date on which
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