Chemical Reactions What is a Chemical Reaction? Types of Chemical Reactions Redox Reactions Nonredox Reactions Classifying Reactions What is a Chemical Reaction? A chemical reaction is a process in which the identity of at least one substance changes. A chemical equation represents the total chemical change that occurs in a chemical reaction using symbols and chemical formulas for the substances involved. Reactants are the substances that are changed and products are the substances that are
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Cuprammonium Rayon threads from Filter Paper AAKASH NARAYAN XII-B DON BOSCO SCHOOL i.n.d.e.x 1. Objective 2. Certificate 3. Acknowledgement 4. Apparatus 5. Chemicals 6. Summary 7. Introduction 8. Procedure 9. Precautions 10. Bibliography o.b.j.e.c.t.i.v.e To make Cuprammonium Rayon Threads From Filter Paper c.e.r.t.i.f.i.c.a.t.e This is
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Comparative study of commercial antacids Problem Solving Assessment 1. The electrode potentials of some metal electrodes are Cu2+ / Cu = 0.34 V ‚ Pb2+ / Pb = — 0.13 V Ag+ / Ag = 0.80 V‚ Zn2+ / Zn = — 0.76 V. Which of the following reactions will not occur ? (a) Zn + Cu2+ → Zn2+ + Cu (b) Zn + Pb2+ → Zn2+ + Pb (c) Cu + 2Ag+ → Cu2+ + 2 Ag (d) Cu + Pb2+ → Cu2+ + Pb 2. The property of a colloidal solution in which the dispersion medium moves when placed in an electric field is called
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Introduction Close to 80 years of history in Hong Ko ng First bottle of Coca-Cola was sold here in 1928 Well-received in the market Add more variety to their portfolio Research Methodology 50 copies of questionnaire distributed Face-to-face Research Methodology Figure 1.2 Age 8% 4% 14% 18 or below 19 - 29 10% 30 - 39 40 - 49 64% 50 or above Female and male respondents are equal ly and randomly distributed Research Methodology Figure 1.3 Frequency of purchasing "Coca-Cola" Every day
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ionisation energy of calcium = +1100 kJ/mol Electron Affinity of chlorine = -364 kJ/mol 2. Draw Born-Haber cycles and calculate the L.E. of Cu2O and CuO given: ∆Hf (Cu2O) = -166.7 kJ/mol ∆Hf(CuO) = -155.2 kJ/mol 1st I.E. (Cu) = +750 kJ/mol 2nd I.E. (Cu) = +2000 kJ/mol ∆Hat (Cu) = +339.2 kJ/mol 1st E.A. (O) = -141.4 kJ/mol 2nd E.A. (O) = +790.8 kJ/mol 3. 100 cm3 of 0.5 mol/dm3 ethanoic acid were mixed with 100cm3 of 0.5 mol/dm3 NaOH. The temperature rose from 18.2°C to 21.45°C. Calculate the
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that Pb‚ Ba‚ and Cu were present. Adding NaCl resulted in a white precipitate and based on our data from week one it meant that Pb was present. We centrifuged and separated the mixture from the Pb precipitate. Then by adding H2SO4‚ another white precipitate was formed. It was found to be Ba due to Pb already been taken out of the solution from before. After once again centrifuging and separating‚ adding NH3 resulted in a half blue and clear solution. Based on data from week one‚ Cu had to be present
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opaque Turns to dark green color Part C Observations Solution becomes darker Part D Observations Mixture goes back to its natural state Part E Observations Bubbling Heat is generated Liquid is clear In-Lab Discussion 1) A. Cu (NO2)2 Cu (OH)2 B. Cu (OH)2 CuO C. CuO CuSO4 D. CuSO4 Cu0 Post Lab Discussion 2) 1.95/0.91*100= 214%; we were not able to verify the Law of Conservation of Mass within 5% of the
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properties of a soil. The data collected will be used to plot a GSD curve. The GSD curve is plotted in log scale to show small changes and details that a normal scale would lose. Based off of the GSD curve we can then calculate the Coefficient of Uniformity (Cu) and the Coefficient of Curvature (Cc). These coefficients are the standards in the USCS to classify if a soil is poor or well graded. How well a soil is graded determines how well the soil will compact for foundations. Test Procedure: Lab Procedure
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shade No change‚ brought out pink very slightly No change No change Created a cream looking liquid‚ did not mix with pink substance Darkened color‚ changing to more of a purple tint as time passes on. Immediately turned to a navy blue color Cu(NO3)2 Same musty looking cloud that floated and did not mix well‚ brought out the blue color Immediately changed color to a musty yellow color‚ not very see through anymore either No Change No change Caused creamy white substance that did not
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Final Draft Field Evaluation of Center Pivot Sprinkler Irrigation Systems In Michigan Report Prepared by: Sabah Almasraf‚ Jennifer Jury and Steve Miller Department of Biosystems and Agricultural Engineering Michigan State University March 2011 1 Table of Contents Introduction ..................................................................................................................................... 5 Background and Recent Research .......................................
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