Biochemical Redox Reactions
By Khair Ullah, Jr. Research.Fellow
International Center for Chemical and Biological Sciences (ICCBS) University of Karachi
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CONTENTS
Electrochemistry: definition & importance
Conductors: metallic & electrolytic conduction,
Electrolytes, Electrochemical cell & electrolytic cell
A simple electrochemical cell: Galvanic cell or (Daniell Cell)
Cell reaction, cell representation, Salt bridge & its use,
Electrode potential, standard electrode potential, SHE,
Standard cell potential or standard electromotive force of a cell
Electrochemical series (Standard reduction potential values)
Nernst Equation, Relationship with Standard cell potential with Gibbs energy & also equilibrium constant
Resistance (R) & conductance (G) of a solution of an electrolyte
Conductivity (k) of solution, Cell constant (G*) & their units,
Molar conductivity (Λm) & its variation with concentration & temperature,
Debye Huckel Onsager equation & Limiting molar conductivity,
Kohlrausch’s law & its application & numerical problems.
Electrolytic cells & electrolysis.
Some examples of electrolysis of electrolytes in molten / aq. state.
Faraday’s laws of electrolysis: First & second law- numerical problems. Corrosion, Electrochemical theory of rusting.
Prevention of rusting.
Class XII Electrochemistry - Nernst equation.Arunesh Gupta
Introduction, application of electrochemistry, metallic conduction & electrolytic conduction, electrolytes, electrochemical cell & electrolytic cell, Galvanic cell (Daniell cell), Standard reduction & oxidation potential, SHE as reference electrode, Standard emf of a cell or standard cell potential, Electrochemical series & its application, Nernst equation, Relationship between (i) Standard cell potential & equilibrium constant (ii) standard cell potential & standard Gibbs energy, some numerical problems.
2. 1 Covalent Bonds H H O Electron Shell Regular Water Molecule Oxygen Hydrogen Electrons
3. 2 Covalent Bonds H H Positive and Negative Electrodes O Water Molecule, introduced electrons from electrical current. Electron Shell Oxygen Hydrogen Electrons
4. Freed Electron Freed Electron Freed Electron 3 Covalent Bonds H H Positive and Negative Electrodes Broken Bond Broken Bond O Replacement Electrons Water Molecule, introduced electrons from electrical current. Electron Shell Oxygen Hydrogen Broken (covalent) Bond Electrons
5. Freed Electron Freed Electron Freed Electron 4 Covalent Bonds H H Released Hydrogen Atoms (2) Positive and Negative Electrodes O Replacement Electrons Water Molecule, introduced electrons from electrical current. Electron Shell Oxygen Hydrogen Broken (covalent) Bond Electrons
