'Half cell' diaporamas de présentation

Chapter 20

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George Mason University General Chemistry 212 Chapter 21 Electrochemistry Acknowledgements

George Mason University General Chemistry 212 Chapter 21 Electrochemistry Acknowledgements Course Text: Chemistry: the Molecular Nature of Matter and Change, 6 th ed , 2011, Martin S. Silberberg, McGraw-Hill

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Balance Redox Rxns:

Balance Redox Rxns:. Fe(OH) 3 + [Cr(OH) 4 ] -1 Fe(OH) 2 + CrO 4 -2. AP CHM HW. Read: Chapter 18. Review the Multiple-Choice Section of the Midterm. Electro-chemistry. Metallic Conduction. The flow of electrons through a metal. Ionic Conduction.

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Chapter 18 Electrochemistry

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Electrochemistry

Electrochemistry. The Study of the Interchange of Chemical and Electrical Energy. Galvanic or Voltaic Cells. The reactants and products of some oxidation-reduction reactions can be physically separated so that the electron transfer can only occur via a wire.

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Electric power conversion in electrochemistry

Electrolysis / Power consumption. Chemical Reactions. Electric Power. Electrochemical battery / Power generation. Electric power conversion in electrochemistry. Cell Construction. vessel. -. +. battery. power source. e -. e -. conductive medium. (-). (+). inert electrodes.

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Balance Redox Rxns:

Balance Redox Rxns:. Fe(OH) 3 + [Cr(OH) 4 ] -1 Fe(OH) 2 + CrO 4 -2 in base. Electrochemistry. Metallic Conduction. The flow of electrons through a metal. Ionic Conduction. The movement of ions (electrolytes) through a solution Electrolytic Conduct. Electrode.

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Electrochemistry

Chapter 20. Electrochemistry. Voltaic Cells. A chemical reaction can perform two types of work: Produce a gas to perform PV work Use movement of electrons from redox reactions to perform electrical work. Voltaic Cells.

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Electricity from Chemical Reactions

Electricity from Chemical Reactions. Electrochemistry. The production of electrical energy from chemical reactions Redox reactions involve the transfer of electrons Redox means that reduction and oxidation are occurring simultaneously. Reduction.

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Discovering Electrochemical Cells

Discovering Electrochemical Cells. PGCC CHM 102 Sinex. Electrolytic Cells. Cell Construction. vessel. -. +. battery. power source. e -. e -. conductive medium. (-). (+). inert electrodes. Sign or polarity of electrodes.

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Discovering Electrochemical Cells

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Terminal Oxidative Phosphorylation

Terminal Oxidative Phosphorylation. NAD + and NADH. Nicotinamide adenine dinucleotide is a central intermediate Previously encountered as a product of glycolysis NADH is formed by the addition of a hydrogen nucleus and 2 electrons (hydride ion) to NAD +

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TO CATCH LOTS OF FISH, YOU MUST FIRST GO TO THE WATER. -ANON-

TO CATCH LOTS OF FISH, YOU MUST FIRST GO TO THE WATER. -ANON-. GALVANIC (VOLTAIC) CELLS THE ENERGY RELEASED IN A REDOX REACTION CAN BE USED TO PERFORM ELECTRICAL WORK. Cu +2 (aq) + Zn (s) ? Zn +2 (aq) + Cu (s)

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Chapter 17

Chapter 17. Corrosion and Degradation of Materials. Introduction. Deterioration of a material due to chemical attack by the environment Typically, a non-stress related failure There are exceptions Terminology Metals: Corrosion Dissolution in the surrounding medium

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REDOX REACTIONS

REDOX REACTIONS. OXIDATION NUMBERS. THE APPARENT CHARGE ON AN ATOM RULES The oxidation number on any free element is zero The oxidation number of a monatomic ion is equal to the charge on the ion The oxidation number of Hydrogen in most compounds is +1

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Ch 14: Electrode Potentials

Ch 14: Electrode Potentials. Hanford, WA. Na 2 S 2 O 4 reduces Fe 3+ in soil to Fe 0. Fe. CrO 4 2- (aq) + Fe(s) + 4H 2 O(l) ? Cr(OH) 3 (s) + Fe(OH) 3 (s) + 2OH - (aq) ClHC=CCl 2 (aq) H 2 C=CH 2 + HC?CH + Cl - (unbalanced). Fe catalyst. Redox Reaction Review

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Calculating the Cell Potential

Calculating the Cell Potential The process of calculating the cell potential is simple and involves calculation of the potential of each electrode separately, then the overall cell potential can be determined from the simple equation: E cell = E cathode - E anode

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Starter - complete the following scheme giving all Formula

Starter - complete the following scheme giving all Formula. H+. Ethanoyl chloride Formula?. CH 3 COOH + C 2 H 5 OH. CH 3 COCl. ethanamide CH 3 CONH 2. NH 3 / ethanol. C 2 H 5 OH. Reagents?. salt + ethanol CH 3 COO - + C 2 H 5 OH. OH-. Ethyl ethanoate Formula?.

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Summary of Potentiometry : pH and Ion Selective Electrodes Potentiometric Sensors

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Electrochemistry Lesson 8 Electrochemical Cells

Electrochemistry Lesson 8 Electrochemical Cells. Electrochemical cells are Batteries. Alkaline Batteries. KOH. Car Batteries. Pb-Acid H 2 SO 4. Mitsubishi iMiEV - Pure Electric Car. $ 36,000 US. $ 50,000 Can. Powered by a 330 v Li-Ion Rechargeable battery.

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