Electro Chemistry Intro

Electro Chemistry is the study of Kinetic properties of ions in a solution , production of electricity as a result of chemical reactions and the interconversion between electrical and chemical energies .
 

Main topics to be discussed:-
1. Electrolysis
2. Electrolytic conduction
3. Galvanic cell
4. Cells and batteries
5. Corrosion
 
#Introduction and important terminologies
~ Conductors : The substances which allow the electricity to pass through them are known as conductors .
There are two types of conductors
  a) Metallic / Electronic Conductors :
  • Free electrons are responsible for the conduction of electricity

  • Electrons move from negative terminal to the positive terminal .
    (Cathode to Anode)

  • When the current flows, no chemical reactions take place .

  • No transfer of mass or matter during a chemical reaction .
    (The mass of an electron is considerably negligible)

  • Eg: 
         - Metals like CuS , CdS , HgS in solid state
         - Non-Metals like Graphite , Coke , Phosphorus black and  petroleum
         - And a few exceptions of Polymers like polythiophene , polyaniline 
  b) Ionic / Electrolytic Conductors
  • Free ions are responsible for the conduction of electricity .

  • Ions move towards their opposite charges .
    ( Cations to cathode and anions to anode )

  • When the current flows , Chemical reactions take place .
    (ions are responsible )

  • Transfer of matter takes place in the form of ions .
  • Eg:
         - Molten salts , solutions of all acids and bases


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