a=1). EDTA in this experiment is used as a masking agent to hide metal ions that would normally interfere with the analysis in this reaction. Thus the absorbance of [Fe(CN)6]3- at time t is given by: (6) Absorbance = 1012 [Fe(CN)6]3- The oxidation of C6H8O6 by [Fe(CN)6]3- involves a mechanism that
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AP Chemistry Final Exam Review ESSAY. Write your answer in the space provided or on a separate sheet of paper. 1) Explain the difference between a qualitative and a quantitative measurement. Provide examples to illustrate this difference. Answer: A qualitative measurement is a measurement that gives descriptive‚ nonnumeric results; a quantitative measurement is a measurement that gives definite‚ usually numeric results. "The rock is heavy" would be a qualitative measurement. "The rock weighs 110
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Social Alchemy 2nd Quarter / SY 2012 – 2013 Eng’r. Josephine A. Ng CHM142L/B21 Concepcion‚ Jermin B. Group# 2 Experiment No. 1 ------------------------------------------------- MELTING POINT AND BOILING POINT OF ORGANIC COMPOUNDS ------------------------------------------------- ABSTRACT The melting point (MP) and the boiling point (BP) are probably the most widely used physical constant in the field of science. Determining the boiling point and the melting point of a compound helps you to characterize
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CH 125 INORGANIC CHEMISTRY FOR MICROBIOLOGY Laboratory Manual 2013 Edition By Brian Clark‚ Marco Castillo & Patrick Chan CENTENNIAL COLLEGE OF APPLIED ARTS & TECHNOLOGY‚ SCARBOROUGH‚ ONTARIO Preliminary Laboratory Information - CH 125 The following safety information is provided to the student in order to ensure that all students and college staff working in the laboratory are aware of common industrial laboratory safety practices. Laboratory
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DOWNLOADED FROM WWW.STUDIESTODAY.COM DOWNLOADED FROM WWW.STUDIESTODAY.COM d – AND f – BLOCK ELEMENTS Electronic Configuration of Transition Metal/Ions The d-block element is called transition metal if it has partly filled d-orbitals in the ground state as well as in its oxidised state. The general electronic configuration of transition metal is (n–1) d1–10ns1–2. Exceptions in electronic configuration are due to (a) very little engery difference between (n–1) d and ns orbitals and (b) extra stability
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of the copper Control Group: rain water the copper is exposed to Materials 12 strips of copper pH meter (+ 0.01) Digital scale (+ 0.01) graduated cylinder (±0.05 mL) experimental setup diagram 60mL of rain water 60mL of 0.5 M HNO3 60mL of 1.0 M HNO3 60mL of 1.5 M HNO3 4 petri dishes Experimental Process 1.
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6.152J/3.155J SpringTerm 2005 Lecture 12 -- Etch and Pattern Transfer I (Wet Etch) Etching and Pattern Transfer (1) OUTLINE • Basic Concepts of Etching • Wet Etching • Specific Wet Etches – Silicon – Silicon Dioxide – Aluminum • Dry (Plasma) Etch – Review of Plasmas Reading Assignment: 6.152J / 3.155J -- Spring Term 2005 Plummer‚ Chapter 10 1 Lecture 12 - Etch and Pattern Transfer I (Wet Etch) Introduction • Etching is selective removal of thin film(s) resulting in a desired
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Melting Point and Boiling Point of Organic Compounds Bongo‚ Sayre‚ J1 1Student‚ Organic Chemistry 1 Laboratory / B11‚ School of Chemical Engineering‚ Chemistry and Biotechnology‚ Mapúa Institute of Technology ABSTRACT The melting point of a substance is the temperature at which the material changes from a solid to a liquid state while the boiling point is the temperature at which it changes from liquid to solid. In this experiment‚ the main objectives were to determine the effects of the following
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Are you turning to the answers too soon? When you get stuck on a question do everything you can to answer it EXCEPT looking at the answer 1. Use your textbooks 2. Use your notes 3. Use the presentations 4. Use drop in 5. Use websites Don’t ever simply copy down an answer without knowing how to get there. BUT finally do check all your answers carefully here. You can also read the examiner’s report for each question.
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Chapter 1 Chemical Reactions and Equations Q.1. Why should magnesium ribbon be cleaned before burning in air ? Ans: Magnesium ribbon is a very reactive metal. When stored it reacts with oxygen to form a layer of magnesium oxide on its surface. This layer of magnesium oxide being a stable compound prevents further reaction of magnesium with oxygen. The magnesium is cleaned before burning in air to remove this layer so that the metal can be exposed to air properly. Q.2. Write the balanced
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