Ryan Tsinigine Partner: Yuchen Title: How Much Gas CHM 151 LL Wednesday: 11:15-2:00 Instructor: Dr. Leary May 1‚ 2013 Introduction In this project we will choose a solid reagent‚ Mg‚ CaCO3‚ or Na2CO3‚ to react with a hydrochloric acid solution‚ HCl. We are going to measure the amount of gaseous product obtained from the amount of gaseous product obtained from reaction. Then compare to theoretical yield‚ Percent Yield=Actual Yield of Gas/ Theoretical Yield of Gas×100‚ based on stoichiometric
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CHEM111AC‚ Experiment#9 - Ionic Reactions Discussion/Error Analysis In the first part of this experiment‚ the student was presented with 7 unique and unidentified bottles of solutions labeled A-G and was expected to be able to analyze the 7 solutions through trial and error and mixing them with one another. For solution A: mixing A + B formed a precipitate‚ A + C generated heat‚ A + D gave no reaction‚ A + E gave no reaction‚ A + F gave no reaction‚ A + G formed a precipitate. For solution B: mixing
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Prior to begin the experiment‚ preparation for some solutions is required to enhance the lab performance. The solutions needed are standardized potassium bromate‚ standardized sodium thiosulfate‚ and starch indicator. First‚ to prepare a starch indicator‚ pulverize 1g of soluble starch and add 15mL of water to make it as a paste-like substance. Dilute it with about 500mL of boiling water‚ and continue to heat until the mixture becomes clear. Cool it to room temperature and save it into a stoppered
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Alumina Yield in the Bayer Process; Past‚ Present and Prospects Edited by TMS (The Minerals‚ Metals & Materials Society)‚ 2007 ALUMINA YIELD IN THE BAYER PROCESS PAST‚ PRESENT AND PROSPECTS Roelof Den Hond1‚ Iwan Hiralal2‚ Ab Rijkeboer3 Alcor Technology‚ Clinckenburgh 10‚ 2343 JH Oegstgeest‚ The Netherlands 2 Hiracon‚ Prinses Irenelaan 2‚ 2273 DD Voorburg‚ The Netherlands 3 Rinalco‚ Helmlaan 16‚ 2244 AZ Wassenaar‚ The Netherlands 1 Keywords: hydrate‚ alumina‚ yield‚ liquor productivity
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a) What other name(s) does this chemical go by? (i.e. synonyms) Other names for sodium bicarbonate are baking soda‚ sodium hydrogen carbonate‚ and carbonic acid sodium. (b) What is the type(s) of hazard associated with this chemical? (i.e. poisonous‚ biohazardous‚ ...) According to the Globally Harmonized System (GHS) of Classification and Labeling of Chemicals‚ sodium bicarbonate has not been categorized as hazardous. (c) What should you do if this chemical splashes in your eyes or is spilled
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Timothy Johns Christian Howard Wan Huang 10/18/12 Flame Test Lab Introduction Spectroscopy is the study of the electromagnetic radiation emitted or absorbed by atoms and molecules. These studies are very helpful in determining an unknown element‚ given the fact that all elements burn a different color. The flame colors vary because of the different amounts of energy the elements give off. This lab is made for the learner to determine the identity of two unknown elements. Hypothesis If
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| 5 | 38.2 | 27.2 | 11.0 | Average amount of Ca(OH)2 added = 11.2cm3 (±0.1ml) Hydrochloric acid – 10cm3‚ molarity is 0.05 mol dm3 Calcium Hydroxide – 11cm3 Ratio of calcium hydroxide : hydrochloric acid = 1 : 2 Ca(OH)2 + 2HCl CaCl2 + 2H2O Molarity of Ca(OH)2 hydrochloric acid molarity‚ 10/1000×0.05=5×10-4 Therefore‚ the molarity of calcium hydroxide is half that of the HCl =2.5×10-4 Error analysis Pipette 0.04/10×100=0.4% Burette 0.1/11.2×100=0.9% Therefore‚ the
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correct orientation‚ therefore speeding the process of the reaction. This lab will investigate these affects on the rate of a specific reaction. Aim: How does the concentration of HCl affect the rate of the following reaction? CaCO3 (s) + 2HCl (aq) CaCl2 (aq) + CO2 (g) + H2O (l) Variables: Independent variable: Concentration of HCl Dependent variable: Amount of CO2 produced Controlled Variables: Temperature of the room‚ and the HCl No stirring or shaking of the experiment at any times
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55 M solution of sodium phosphate. (Write the proper formula for sodium carbonate first.) 12. 300 mL of 0.500 M NaCl is mixed with 400 mL of 0.200 M HCl. Calculate the final total [Cl-]. 13. 200 mL of 0.500 NaCl is mixed with 300 mL of 0.200 M CaCl2. Calculate the final total [Cl-]. 14. An aqueous solution of Pb(NO3)2 is mixed with an aqueous solution of KBr and a precipitate forms. a. Write a balanced formula equation for this reaction. b. Write a balanced total ionic equation for this reaction
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Lab: Flame Test Purpose: to determine the ID of 2 unknown substances Background Information: Every atom consists of a nucleus with tiny electrons whizzing around it. The further away from the nucleus they are‚ the more energy the electrons have. If a metal atom is heated‚ the electrons get enough energy to jump higher away from the nucleus‚ they become “excited”. When they fall back closer to the nucleus (back to their ground state)‚ they give off this extra energy as light. Why is the
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