'Reduction half' diaporamas de présentation

Chapter 20 Electrochemistry

Chapter 20 Electrochemistry. Oxidation and Reduction. Oxidation (loss of e - ) Na Na + + e - Reduction (gain of e - ) Cl + e - Cl -

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Chapter 19: Electrochemistry

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Oxidation/Reduction Reactions

Oxidation/Reduction Reactions. REDOX REACTONS !. All chemical reactions fall into two categories those that are redox and those that are not redox ! Redox reactions involve the transfer of electrons .

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Fundamentals K: Oxidation and Reduction

Fundamentals K: Oxidation and Reduction. To date, we have look at 2 specific types of chemical reaction: Acid-Base Reactions Precipitation Reactions There is one more reaction type we need to consider: Oxidation-Reduction or Redox Reactions. Oxidation-Reduction Reactions.

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Introduction to Chem II

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Unit 11- Redox and Electrochemistry

Unit 11- Redox and Electrochemistry. Anode Cathode Electrochemical cell Electrode Electrolysis Electrolyte Electrolytic cell Half-reaction Oxidation Oxidation number. Redox Reduction Salt bridge Voltaic cell. C 3 H 8 O + CrO 3 + H 2 SO 4 ? Cr 2 (SO 4 ) 3 + C 3 H 6 O + H 2 O.

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Electrochemistry

Electrochemistry. Oxidation Reduction Reactions. (1) Oxidation: Loss e- Increase in Oxidation Number Zn (s) ?Zn 2+ + 2e - (2) Reduction: Acceptance of e - Decrease in Oxidation Number Cl 2(g) + 2e - ? 2Cl -.

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Cell Voltages

Cell Voltages. To compare cells compare voltages of cells in their standard state. Standard States For solids and liquids: the state of the pure solid or liquid at 1 atm and at a specified temperature For gases: the gaseous phase at 1 atm and at a specified temperature

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Redox Reactions

Redox Reactions. Oxidation Number. The oxidation state of an element in an elemental state is zero. (O 2 , Fe, He) The oxidation state of an element in a monoatomic ion is the charge of that ion. (oxidation number of iron in Fe +3 is +3)

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Redox Reactions

Redox Reactions. Chapter 20. Section 20.1. Oxidation And Reduction. Redox Reactions. A chemical rxn in which electrons are transferred from one atom to another is called an oxidation-reduction reaction , or redox rxn .

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9.2 Redox reactions

9.2 Redox reactions. 9.2.1: Deduce simple oxidation and reduction half-equations given the species involved in a redox reaction. Step 1: Identify the oxidation states of the species on either side of the reaction. Step 2 :

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Electrochemistry

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Chapter 19: Electrochemistry

Chapter 19: Electrochemistry. Lecture Topics 1. Balancing Redox /Oxidation-Reduction Reactions. 2. Voltaic Cells 3. Electrolysis 4. Corrosion. Chapter 19: Oxidation Reduction Reactions. (1) Oxidation: Loss e- Increase in Oxidation Number Zn (s) ?Zn 2+ + 2e -

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Synthesis of Alum Lab

Synthesis of Alum Lab. This synthesis reaction involves a redox reaction and the formation of a complex ion. Balanced Net Ionic Equations. Mole ratios of Al to K to alum are all 1:1. Aluminum hydroxide dissolves in a solution with excess KOH: Al(OH) 3 (s) + OH - (aq) ? [Al(OH) 4 ] - (aq)

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Oxidation/Reduction Reactions

Oxidation/Reduction Reactions. REDOX REACTONS!. All chemical reactions fall into two categories those that are redox and those that are not redox ! Redox reactions involve the transfer of electrons.

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Step 1 : Write the unbalanced formula equations

NaMnO 4 ( aq ) + HCl ( aq ) --------> Cl 2 (g) + MnCl 2 ( aq ).

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is added to a solution of zinc bellwork

Aluminum is added to a solution of zinc nitrate. Write the overall balanced equation for the reaction. Write the overall balanced net ionic equation for the reaction. Write the balanced half reactions for this reaction and label the reduction half and the oxidation half.

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