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2. Electrochemistry

Electrochemistry studies the interconversion between chemical energy and electrical energy through electrochemical cells. It encompasses concepts such as galvanic and electrolytic cells, the Nernst equation, and the conductivity of solutions. Additionally, electrochemical principles are crucial in applications such as batteries, fuel cells, and corrosion processes, highlighting their importance in various practical contexts.

Sections

  • 2

    Electrochemistry

    This section outlines the key objectives of electrochemistry, highlighting its importance in energy conversion and chemical reactions.

  • 2.1

    Electrochemical Cells

    Electrochemical cells convert chemical energy into electrical energy or vice versa, with galvanic and electrolytic cells playing key roles in energy conversion.

  • 2.1.1

    Daniell Cell And Its Functioning

    This section introduces Daniell cells, a type of galvanic cell that converts chemical energy into electrical energy through redox reactions.

  • 2.2

    Galvanic Cells

    Galvanic cells are electrochemical cells that convert chemical energy from spontaneous reactions into electrical energy.

  • 2.2.1

    Measurement Of Electrode Potential

    This section discusses the principles and methods for measuring electrode potentials in electrochemical cells, highlighting the significance of these measurements in understanding redox reactions and calculating cell voltages.

  • 2.3

    Nernst Equation

    The Nernst Equation describes the relationship between the cell potential of an electrochemical cell and the concentrations of its constituents.

  • 2.3.1

    Equilibrium Constant From Nernst Equation

    The section discusses the principles of electrochemical cells, focusing particularly on equilibrium constants and their relationships to cell potentials.

  • 2.3.2

    Electrochemical Cell And Gibbs Energy Of The Reaction

    This section describes the functioning of electrochemical cells, including galvanic and electrolytic cells, relationships between Gibbs energy and cell potential, and concepts of conductivity.

  • 2.4

    Conductance Of Electrolytic Solutions

    This section discusses the principles of conductance and resistivity, including the definitions and relationships between electrical resistance, conductivity, and molar conductivity.

  • 2.4.1

    Measurement Of The Conductivity Of Ionic Solutions

    This section discusses the measurement of the conductivity of ionic solutions, highlighting the significance of conductivity cells and the effect of concentration on conductivity.

  • 2.4.2

    Variation Of Conductivity And Molar Conductivity With Concentration

    This section discusses how conductivity and molar conductivity of electrolytic solutions change with concentration.

  • 2.5

    Electrolytic Cells And Electrolysis

    Electrolytic cells use electrical energy to drive non-spontaneous chemical reactions, while electrolysis involves the decomposition of compounds due to electric current.

  • 2.5.1

    Products Of Electrolysis

    The products of electrolysis depend on the materials being electrolyzed and the type of electrodes used, influencing the electrochemical reactions that occur.

  • 2.6

    Batteries

    This section discusses batteries, their types, construction, operation, and significance in converting chemical energy to electrical energy.

  • 2.6.1

    Primary Batteries

    Primary batteries are galvanic cells that convert chemical energy into electrical energy through spontaneous redox reactions, and are designed for single-use applications.

  • 2.6.2

    Secondary Batteries

    Secondary batteries are rechargeable electrochemical cells that can be reused multiple times, differing from primary batteries, which are non-rechargeable.

  • 2.7

    Fuel Cells

    Fuel cells convert the chemical energy from fuels like hydrogen directly into electricity with high efficiency and low environmental impact.

  • 2.8

    Corrosion

    Corrosion is an electrochemical process in which metals, primarily iron, are oxidized, resulting in damage to structures and objects.

  • 2.9

    Summary

    This section showcases the fundamental concepts of electrochemical cells, including galvanic and electrolytic cells, along with key equations and definitions related to electrochemistry, conductivity, and electrolysis.

  • 2.10

    Exercises

    This section covers a series of exercises aimed at reinforcing the fundamental concepts of electrochemistry, including calculations involving galvanic and electrolytic cells.

Class Notes

Memorization

What we have learnt

  • Electrochemical cells conve...
  • The standard electrode pote...
  • Conductivity of solutions a...

Final Test

Revision Tests

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