Chemistry 281(01) Winter 2014 Instructor: Dr. Upali Siriwardane

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Presentation transcript:

Chemistry 281(01) Winter 2014 Instructor: Dr. Upali Siriwardane CTH 277 10:00-11:15 am Instructor: Dr. Upali Siriwardane E-mail:  upali@latech.edu Office:  311 Carson Taylor Hall ; Phone: 318-257-4941; Office Hours:  MTW 8:00 am - 10:00 am; TR 8:30 - 9:30 am & 1:00-2:00 pm. January 16, 2014 Test 1 (Chapters 1&,2), February 6, 2014 Test 2 (Chapters 3 &4) February 25, 2014, Test 3 (Chapters 4 & 5), Comprehensive Final Make Up Exam: February 27, 2012 9:30-10:45 AM, CTH 311.

Chapter 5. Oxidation and reduction

Electrochemistry Review

Oxidation /Reductions Conventions

Rules for assigning oxidation numbers

Assigning Oxidation Numbers

Reducing Agents and Oxidizing Agents

Balancing Redox Equations by the Half-reaction Method

Types of electrochemical cells

Types of electrochemical cells

Zinc-carbon dry cell

Zinc-carbon dry cell

Lead storage battery

Lead storage battery

Lead storage battery

Voltaic cells

Voltaic cells

Voltaic cells

Voltaic cells

Cell diagrams

Cell diagrams

Electrode potentials

Standard hydrogen electrode

Electrode potentials

Electrode potentials

Half reactions

Half reactions standard reduction potentials

Cell potentials

Concentration dependency of E

Concentration dependency of E

Concentration dependency of E

Concentration dependency of E

Concentration dependency of E

Concentration dependency of E

Calculation of cell potentials

Calculation of cell potentials

Calculation of cell potentials

Calculation of cell potentials

Cell potential, equilibrium and DG

Equilibrium constants

Free energy and cell potential

Corrosion

Rusting

Corrosion prevention

Electrolytic cells

Applying a voltage

Applying a voltage

Overvoltage or overpotential

Overvoltage or overpotential

Overvoltage or overpotential

Overvoltage or overpotential

Electrolytic cells

Electrolytic example

Electrolytic example

Electrolytic example

Stoichiometry of electrochemical reactions

Stoichiometry of electrochemical reactions

Stoichiometry of electrochemical reactions

Example

Extraction of Elements

Ellingham Diagrams

Extraction of Iron in a Blast Furnace

Bayer process for Aluminum

pH electrode

pH electrode

pH electrode

How a pH electrode works

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