Electro Chemistry Intro2

#Important terminologiesPart2


 ~ Insulators : The substances which do not allow electricity to pass through them (or) the substances which do not conduct electricity are known as insulators . 
Eg: 
   - Pure water , Glucose (C6H12O6) , Rubber , Mica , Organic compounds like Urea 

 ~ Semi Conductors : The substances with less conductivity than conductors but more than Insulators are known as semi conductors .
              - They can formed by doping III A (or) V A  group elements in place of IV A group elements .
Eg:
   - Pure Silicon , Germanium , Silicon Carbide

~ Super Conductors : Substances with 0 (or) no resistivity are known as super conductors .
Eg:
  - Ceramics and certain alloys

~ Electrolytes : 
  • Substances which produce ions and conduct electricity in molten or aqueous state are known as electrolytes .
  • Conductivity is due to the free ions produced in molten or aqueous state
    Eg:
         - Acids , bases and salts
There are two types of electrolytes ,

1. Weak electrolytes : The substances which undergo partial ionization are known as weak electrolytes .
Eg: 
   - Weak acids like ; H3BO3 , HCOOH , HCN etc.
   - Weak bases like ; NH4OH , NH3  etc. 

2. Strong electrolytes : The substances which undergo almost complete ionization are known as strong electrolytes .
Eg:
   - All Salts , Strong acids like ; HCl , H2SO4 , HNO3 etc.
   - Strong bases like ; NaOH , KOH , etc.

~ Non-Electrolytes : 
  • Substances which do not conduct electricity in molten or aqueous state are non-electrolytes .
  • Due to the absence of free ions , Non electrolytes do not conduct electricity .
    Eg:
       - Sugar , Glucose , Urea , Glycerin , Benzene etc.





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