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The Significance of Electrochemistry in Biological and Environmental Processes

Electrochemistry plays a crucial role in various biological and environmental processes, including cellular respiration, photosynthesis, and alcohol metabolism. It involves oxidation-reduction (REDOX) reactions, where electrons are transferred between substances. For instance, in the combustion of methane, CH4 reacts with oxygen to produce carbon dioxide and water. Understanding oxidation (loss of electrons) and reduction (gain of electrons) is essential for grasping these chemical changes. Key concepts include oxidizing and reducing agents, as well as the assignment of oxidation numbers, vital for predicting reaction behaviors.

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The Significance of Electrochemistry in Biological and Environmental Processes

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  1. Why Is Electrochemistry Important? Chevy Volt

  2. cellular respiration

  3. photosynthesis

  4. alcohol metabolism

  5. Oxidation-Reduction(REDOX) Reactions 1. Reaction with oxygen e.g. CH4 + 2 O2 CO2 + 2 H2O methane ice

  6. 2. Transfer of electrons OXIDATION (loss of electrons) e.g. (s) Zn 2+(aq) + 2 e – (aq) + 2 e -  Cu (s) Zn (s) + Cu 2+(aq)  Zn 2+(aq) + Cu (s) Zn Cu 2+ REDUCTION (gain of electrons) oxidizing agent: substance that is being reduced reducing agent: substance that is being oxidized

  7. G E R L E O ain lectrons Eduction oss lectrons xidation Sorry . . . I don’t growl. O I L R I G xidation s oss eduction s ain

  8. Oxidation Number A positive or negative number that corresponds to the apparent net electric charge that an atom would have if electron pairs in covalent bonds belonged entirely to the more electronegative atom. Rules for Assigning Oxidation Numbers • F is ALWAYS -1. • 2.H is almost always +1, except when found in metal hydrides. • e.g. Li H • +1 -1 3.O is almost always -2, except where rules 1 & 2 would be violated. e.g. O F2 H2 O2 +2 -1 +1 -1

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