Observations: Part I: Reaction between iron and oxygen Appearance of steel wool after 20 minutes From (relatively) shiny metal strips to not-so-shiny strips that are stained with dark‚ reddish-brown stuff. Part II: Decomposition of hydrogen peroxide Appearance of potato and hydrogen peroxide combination: Lots of white‚ foamy bubbles around the potato slices. Day 2 Observations: Part III: Reaction between zinc and acetic acid Appearance of penny in vinegar after
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Sony’s reduction in supply chain Recently a piece of news which has hit the business circles and is being discussed very much is that Sony is going to reduce 75% of supply chain. Sony will now be relying on 250 of its 1000 current suppliers as a part of short term temporary strategy. Sony is choosing these 250 partners for key products such as digital cameras‚ smart phones etc. (Bloomberg Business Week‚ 2014) The news is being discussed in the business circles heavily. Some are criticizing Sony
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Reaction on Reaction Paper The first thing that came to my mind when I have heard about Reaction paper is “What exactly is it?” and before I get an understanding of that‚ I resisted that change. But later‚ when I have studied about it and understood its purpose‚ I have started thinking “Why people avoid change at the first look without an analysis?” The general human tendency is to live in a comfortable zone in which he has lived for quite some time. He draws a circle‚ thinks that circle is his
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person C from country Z calls the person A‚ the result is two international calls. The person C is charged for an international call from country Z to country X. the person A is charged for an international call from country X to country Y. call cost reduction is considered from two perspectives. The first: making change in infrastructure of mobile network operator. The second: considering efficient factor in subscriber side call cost. The factor that affected call cost‚ send/receive SMS or MMS cost of
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after drop a drop of each of the metal ion solutions on the cleaned metal strips. Wash it off after a few minutes‚ and if there is patina present‚ record it. To test the reaction between the solids and hydrogen (H+) ions a small piece of each metal was dropped into a test-tube with 0.5 M hydrochloric acid. Results: The reaction formulas of the metals and the ions are as following: Zn(s)+2H+(aq)->Zn2+ + H2 Zn(s)+Pb2+(aq)->Zn2+ +Pb Zn(s)+Cu2+(aq)->Zn2+ +Cu Zn(s)+2Ag+(aq)->Zn2+ +2Ag Pb(s)+Cu2+(aq)->Pb2+
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Uses and gratifications theory From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Sociology Outline Theory · History Positivism · Antipositivism Functionalism · Conflict theory Middle-range · Mathematical Critical theory · Socialization Structure and agency Research methods Quantitative · Qualitative Historical · Computational Ethnographic · Network analytic Topics · Subfields Cities · Class · Crime · Culture Deviance · Demography · Education Economy · Environment ·
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of an object is determined using a process called titration. According to Petrucci et al.‚ titration is a reaction carried out by the carefully controlled addition of one solution to another. It has several types like acid-base titrations and redox titrations. This experiment focuses on the latter type‚ the redox titration. A redox titration is based on an oxidation-reduction reaction between analyte and titrant (Harris‚2009). It involves the transfer of electrons between the two solutions. This
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PUTTING IT TOGETHER: Classifying Chemical Reactions Purpose: To observe and differentiate between the four different types of chemical reactions. Variables: The independent variables are the sodium chloride‚ sodium carbonate‚ magnesium‚copper‚ copper (11) sulfate‚ silver nitrate‚ oxygen‚ lead(11) nitrate‚ sodium carbonate‚ copper (11) sulfate pentahydrate. The dependent variables are the chemical reactions that are being looked for. For example decomposition‚ synthesis‚ single displacement or double
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Sodium borohydride Reduction of Benzil Introduction: The Purpose of this experiment is for the students to learn how to use sodium borohydride to reduce benzil to its secondary alcohol product via reduction reaction. This two-step reaction reduces aldehydes by hydrides to primary alcohols‚ and ketones to secondary alcohols. In order for the reaction to occur and to better control the stereochemistry and yield of the product‚ the metal hydride nucleophile of the reducing agents such as LiH‚ LiAlH4
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Benzil is produced in the first step of this experiment’s multistep synthesis through the oxidation of benzoin. In order to produce the desired o-diketone‚ the alcohol on benzoin must be oxidized. Nitric acid was the oxidizing agent used in this experiment. As a result‚ the alcohol group on benzoin acted as the nucleophile and attacked the electrophilic nitrogen of nitric acid. As this step forms oxonium‚ excess water in the system deprotonated the oxonium to restore the neutral charge on oxygen
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