Investigation46 - Investigation 46: "How Are Cations...

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Investigation 46: “How Are Cations Identified?” Amber Dethlefsen April 20, 2007 TA: Chen Pei Hung Chemistry 116, CG TH 12:40
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Introduction: In reduction-oxidation reactions, electrons are transferred. In reduction, the electrons are lost. While in reduction reactions, the electrons are gained. Whenever reduction occurs, oxidation must occur as well and vice versa. Whichever compound is being oxidized or losing electrons is the reducing agent. The reducing agent causes another substance to be reduced. Similarly, whichever substance is being reduced or gaining electrons is the oxidizing agent. The oxidizing agent causes another substance to be oxidized. A cation is an ion that is positively charged. While an anion is a negatively charged ion. Different cations have different chemical behavior and characteristics. These chemical differences are helpful when identification becomes important because it allows different cation to be distinguished from each other. This is a notion that is vital to this investigation. A chemical company that is in charge of producing on-site test kits has hired the team of researchers to obtain information about different cations and how to identify them. They also want information on how to separate the different cations while present in solution and how to be able to confirm the identification of them. This requires that the team of researchers create a flow chart in order to safely remove certain cations out of solution. The cations that are present in the solution are Ag + , Ba 2+ , Fe 3+ , and Cd 2+ . The characteristics of these cations is summarized later on in the report. The characteristics that were recorded had to do with whether or not a reaction occurred and if a precipitate formed. This information would be vital to the team of researchers when it is time to create a flow chart
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This note was uploaded on 04/02/2008 for the course CHM 116 taught by Professor Unknown during the Spring '08 term at ASU.

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Investigation46 - Investigation 46: "How Are Cations...

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