'2 2e' diaporamas de présentation

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Oxidation

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9 & 19. ELECTROCHEMISTRY 1

9 & 19. ELECTROCHEMISTRY 1. Electron Transfer Reactions. 1. Electron transfer reactions are redox reactions. 2. Results in the generation of an electric current (electricity) or be caused by imposing an electric current.

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ChemCom 2013

ChemCom 2013. Warm Up: Determine the name and molar mass of the following compounds. NaOH MnO 2 H 2 SO 4. How did you do?. NaOH- 40.00 g/mol, sodium hydroxide MnO 2 - 86.94 g/mol, Manganese (IV) oxide H 2 SO 4 98.09 g/mol, Sulfuric acid

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Electron Transfer Reactions

Electron Transfer Reactions. Electron transfer reactions are oxidation-reduction or redox reactions. Redox reactions can result in the generation of an electric current or be caused by imposing an electric current. Therefore, this field of chemistry is often called ELECTROCHEMISTRY.

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Chapter 3

Chapter 3. Oxidation & Reduction. Redox Reactions. oxidation and reduction occurring simultaneously. can be explained based on:. Gains oxygen. Loses hydrogen. Loses electrons. ? in oxi number. Example 1:. oxidised. reduced. Example 2:. oxidised. reduced. Example 3:. reduced.

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Chapter 20 Principles of Reactivity: Electron Transfer Reactions

Chapter 20 Principles of Reactivity: Electron Transfer Reactions. Oxidation-Reduction Reactions Balancing oxidation-reduction reactions Balancing Redox Equations by the Oxidation Number Change Method (Other Stuff page) Voltaic (Galvanic) Cells Cell construction Cell potential

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Chapter 19

Chapter 19. Oxidation-Reduction Reactions. Section 1: Oxidation and Reduction. Standard 3.g.: Students know how to identify reactions that involve oxidation and reduction and how to balance oxidation-reduction reactions. Objective:

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??? ?? (Prepared by Prof. Tak Kang, SNU) ??? ???? 2Fe + 3/2 O 2 = Fe 2 O 3 ? G < 0 , ??? ?? ?? : ????? ?? Cost of corrosion ??? ? <1995 ? > 5,500 ? $ <GNP ? 4.2%> ?? : ?? ??? ?? - ?? , ?? ?? ???? , ????? ??

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Redox Year 12 Chemistry

Redox Year 12 Chemistry. What is Redox?. REDOX stands for REDuction /Oxidation Which species are oxidised ? 2Mg(s) + O 2 (g) ? 2MgO(s) Fe 2 O 3 (s) + 3CO(g) ? 2Fe(s) + 3CO 2 (g) Zn(s) + Cu 2+ ( aq ) ? Zn 2+ ( aq ) + Cu(s)

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17.7-8 Electrolysis & Applications

17.7-8 Electrolysis & Applications. Since chemical oxidation-reduction involves the transfer of electrons from one substance to another, it should be possible to harness the flow of electrons to produce electricity. We do this with voltaic cells.

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AP Topic 15: Electrochemistry

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Electrochemistry

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Halogens

Halogens. Physical Properties. Which Halogen is the best Oxidising Agent?. Potassium halide solutions Cl - (aq) Brl - (aq) l - (aq) Halogen dissolved in water Cl 2(aq), Br 2(aq) I 2(aq) Write brief plan of investigation Make predicted results table Write up results & conclusion.

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REDOX REACTIONS 1:

Oxidation and reaction. REDOX REACTIONS 1:. Oxidation and Reduction. In the past oxidation and reduction were defined in simple terms. Oxidation - the gain of oxygen or the loss of hydrogen by an element or compound.

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Hour Exam II

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CONSTRUCTING RELATIVE REACTIVITY TABLES

CONSTRUCTING RELATIVE REACTIVITY TABLES. we will examine the observations made when a group of elements and their ions are mixed together. We will then arrange these elements into a table showing relative reactivity.

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Dry Cell Battery

Dry Cell Battery. Anode (-) Zn ---> Zn 2+ + 2e- Cathode (+) 2 NH 4 + + 2e- ---> 2 NH 3 + H 2. Alkaline Battery. Nearly same reactions as in common dry cell, but under basic conditions. Anode (-): Zn + 2 OH - ---> ZnO + H 2 O + 2e-

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Balancing redox reactions

Balancing redox reactions. Two methods for balancing redox reactions: Oxidation number method Half-reaction method. Balance redox equations using the oxidation number method. Balance redox equations in acidic and basic solutions using the half reaction method.

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