w w ap eP m e tr .X w om .c s er UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level *8712516860* CHEMISTRY 9701/36 Advanced Practical Skills 2 October/November 2012 2 hours Candidates answer on the Question Paper. Additional Materials: As listed in the Confidential Instructions READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the
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smaller radius is primarily the result of the strontium atom having greater effective nuclear charge 4. An element is most likely to have properties similar to those of another element in the same group 5. Most elements are Metals 6. Cations have a _____ charge and are _____ than the atoms from which they are formed. positive‚ smaller 7. Order the elements Chlorine‚ Fluorine‚ and Sulfur in terms of increasing atomic radius. F < Cl < S 8. The noble gas with the largest ionization
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Biology 113 Review sheet Chapter 2: * What is a compound and how is it different than an element? Compound is more than one element. An element cannot be broken down by chem. Rxns. * What are the 4 main elements of life? Why? C‚H‚O‚N they make up 96% of living matter and they are found in all of the major macromolecules * Be able to calculate the number of protons‚ neutrons and electrons given an element’s mass number or atomic number. If given this symbol - 4He – can you tell
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to remove a large majority of the impurities whicn include viruses and media components. At Stage 3‚ prior to cation exchange chromatography‚ the purified material in the eluted stream is then subjected to freezing‚ thawing and pooling. Stage 4 involves the Solvent/Detergent (S/D) viral inactivation which is the first dedicated viral clearance step. At Stage 5‚ the product undergoes cation exchange chromatography which aids in removing the S/D reagents while the product remains bound to the column
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HOW TO WRITE AN EFFECTIVE RESEARCH PAPER • Getting ready with data • First draft • Structure of a scientific paper • Selecting a journal • Submission • Revision and galley proof Disclaimer: The suggestions and remarks in this presentation are based on personal research experience. Research practices and approaches vary. Exercise your own judgment regarding the suitability of the content. –P. Kamat Getting ready with data Gather all important data‚ analyses‚ plots and tables Organize results
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Lesson 1.1 - Study Materials Slide 1 Lesson 1.1 : Scientific Method 1. Steps of the Scientific Method The scientific method (performing a study in organized steps) consists of: For example‚ applying the scientific method ultimately led to the enunciation of the Law of Conservation of Mass and Matter. Slide 2 1. Steps of the Scientific Method Step 1: Performing Experiments An experiment is a set of steps (procedures) that are performed under controlled conditions to propose or test
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ABSTRACT Acid Mine Drainage (AMD) problems are the most important environmental problems in sulphide mines especially mines which contain pyrite. Oxidation of sulphides in contact with air and water produces sulphuric acid which reduces the pH of water. The result of these reactions is increase in the solubility of heavy metals and consequently pollution of water resources. The Sarcheshmeh copper mine is one of the largest porphyry copper mines in the world which is located in south-eastern Iran
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Chemistry Summary The particle theory: 1. Matter is made of tiny particles 2. Particles of matter are in constant motion 3. Particles of matter are held together by very strong electric forces 4. There are empty spaces between the particles of matter that are very large compared to the particles themselves. 5. Each substance has unique particles that are different from the particles of other substances 6. Temperature affects the speed of the particles. The
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The purpose of the Weak Acid Dissociation experiment is to determine the dissociation constant of a weak acid experimentally by using acid-base titration with a strong base and stoichiometry. An acid-base titration is a method by which a basic (or acidic) solution of unknown concentration is reacted with an acidic (or basic) solution of known concentration. (1) The pH in acid-base titration is measured using a pH meter or color changing indicator‚ such as phenolphthalein‚ as the known solution is
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Intracellular Fluid (ICF) – This is the fluid that is contained within the cell. In adults it is approximately 2/3’s of the body’s fluid (27 liters). The ICF also known as “cellular soup” is comprised mostly of potassium‚ organic anions‚ proteins and other small cations and anions. Note: The 60-40-20 rule is that in total 60% of our body weight is water with 40% of that being intracellular with the remaining 20% being extracellular. Factors That Affect Movement of Water and Solutes: Membranes – Each
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