Redox reactions (Redox terminology‚ galvanic cells‚ standard electrode potentials‚ strength of oxidizing/reducing agents‚ corrosion and protection against it) Oxidation is defined as the loss of electrons and reduction is defined as the gain of electrons. Oxidizing agents‚ such as oxygen are defined as substances which accept electrons; reducing agents are substances which donate electrons. Redox reactions are: a) The reactions of metals with non-metals 2Na+Cl2→2Na+Cl- b) The reactions
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association of molecules of a solvent with molecules or ions of a solute. As ions dissolve in a solvent they spread out and become surrounded by solvent molecules. Example: As an ionic compound dissolves‚ such as NaCl‚ the ions become surrounded by the solvent‚ say H2O(water) molecules. The ions are said to be ’solvated’ as they become surrounded by the solvent‚ similar to a hoard of bees surrounding a nest. The solvation process helps stabilize the ions in solution and prevents cations and anions from
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experiment‚ equilibrium will be examines in the reaction beteween the iron (III) ion and the thiocyanate ion: Fe3+ (aq) + SCN- (aq) ------ FeSCN2+ (aq) The FeSCN2+ complex ion has a blood red color while the iron and the thiocyanate ion are colorless. Therefore‚ the shift in the reaction can followed by noting a change in the intensity of the clood red color‚ which indicates a change in the concentration of the complex ion FeSCN2+. If the reaction shifts to the right‚ the blood red color will get
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In the book "Looking for Alibrandi"by Melinda Marchetta‚ Josephine Alibrandi’s life is influenced by her mother Christina‚her father Michael‚ while Christina’s life is influenced by the grandma Katia. Josie’s attitudes and way of thinking changes by the influence that her parents have on her. Josie is not the same girl at the end of book as she was at the beginning. "How dare you think that I want to be in your life! I don’t want you anywhere near us‚ especially my mother" (Josie to Michael-
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Homicide Investigations Identifying Best Particles There is a decline for clearance rate of homicides reported police departments. According to homicide investigations identifying best particles by Timothy G.KEEL‚ M.S. Now law enforcement is questioning about such issue. Also the law enforcement is questioning about such issue. The law enforcement is questioning
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E-mail: sales@ibo.org Printed in the United Kingdom by the International Baccalaureate Organization‚ Cardiff. 3016 Contents Introduction The Historical Investigation: Guidance for Teachers Frequently Asked Questions The Historical Investigation: Guidance for Students The Written Account Outlines for the Historical Investigation
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COMBUSTION AND FIRE INVESTIGATION There are many different types of fires and it can be quite difficult to establish what may have started the fire in the first place. Fire investigation is an important process that attempts to establish the cause of the fire and whether a criminal act has taken place. The National Fire Statistics in the UK compiled by the Home Office states that 25% of fires are electrical in origin but this does not tell the whole story. The statistics are compiled from fire
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Polymerization reaCTIONS polymers are high-molecular-weight compounds‚ fashioned by the aggregation of many smaller molecules called monomers. Ex. plastics that have so changed society and the natural and synthetic fibers used in clothing are polymers. Classification of polymers Homopolymers - consist of repeated long chains or structures of the same monomer unit. Ex. PVC(polyvinyl chloride) Copolymers - polymers that consist of more than one molecule. Trimers - molecules consisting
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CSI COMPETENCY STATEMENT VI To maintain a commitment to professionalism As a teacher of young children I am aware of my disposition at all times. Being professional is very important in a child care setting. One of my roles is to serve as a positive role model to the children in my child care. I dress appropriately to work effectively with young children. My co-worker and I wear scrub tops‚ except in summer when hot out. The scrub tops we wear have Disney characters on them‚ and the kids love them
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INTRODUCTION Investigations are the processes that will be used to describe both criminal investigation and crime scene processing distinctions between criminal investigations and crime scene. Crime scene requires strict scientific methodologies such as collections procedures and testing protocol‚ whereas criminal investigation has less of hard science character and relies more on the experience and skills of the investigator rather than rigid scientific protocols and procedures. Evidence is a
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