Chapter_14_Redox_Part_1_ - Chapter 14: Part 1 Redox...

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1 Chapter 14: Part 1 Redox Oxidation-Reduction reactions ---
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Historical background Oxidation of iron by oxygen Redox reactions were discovered in studies of corrosion of Fe by O 2 to form rust 4Fe + 3O 2 -> 2Fe 2 O 3 Because that reaction involved O 2 chemists coined the term oxidation However, Redox reactions might or might not involve oxygen ---------------------
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Why should we learn Redox reactions? Important: In Industry In organic chemistry In biochemistry (chemistry of living systems) In fact: Without Redox reactions, no life (as we know it) would exist on earth We will examine 3 examples ---
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Photosynthesis sunlight 6CO 2 + 6H 2 O Glucose + 6O 2 Photosynthesis occurs via a series of Redox reactions carried out by “electron carriers” --- Synthesis of glucose by plants is the very first step for making nutrients from CO 2 and H 2 O
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Living cells use glucose as a source of energy to synthesize the cellular components Glucose metabolism in plant and in animal cells (including humans) occurs through a series of Redox reactions ---- Metabolic pathways
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Nitrogen fixation N 2 (the nitrogen in the atmosphere) should be converted into a form (NH4 + ) that can be used by plants In soil, there are bacteria that can convert N 2 to NH4 + Root nodules in some plants include bacteria that can synthesize NH4 + (using N 2 and H + , and electrons from electron-carriers in plants) The process is a redox reaction known as nitrogen fixation ---
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Good news! Regardless of whether we are dealing with inorganic, organic, or biological compounds The underlying concept in Redox reactions is the same --------
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Underlying concept Oxidation reduction reactions involve transfer of electrons
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This note was uploaded on 02/27/2012 for the course CHEM 112 taught by Professor Harwood during the Spring '11 term at Purdue University-West Lafayette.

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Chapter_14_Redox_Part_1_ - Chapter 14: Part 1 Redox...

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