Tuesday, 2 June 2015

Simple Chemical Reaction and General Rule for writing Simple Chemical Reaction

Simple Chemical Reaction

                                         Chemical reaction is represented by chemical equation in brief by taking help of symbol and formula of participating substances in reaction.

General Rule for writing Simple Chemical Reaction

   1.     Reactant are written on left hand side and if more than one reactant are present than write plus (+) sign between them.
   2.     Product are written on left hand side and if more than one product are present than write plus (+) sign between them.
   3.     Arrow sign is placed between reactants and products.
Example: Zn + H2SO4 ( Reactants)  -----> ZnSO4 + H2 (Products)
 4.     To get more information from the reaction write temperature, pressure, catalyst name above or below arrow sign. 
   5.     On the right side of the gaseous substances sign and on the left side of heavy substances which precipitate sign is placed.
   6.     Reactions which absorb heat are known as endothermic reactions and (+Q) heat sign is added on reactant side.
   7.     Reactions which produce heat are known as exothermic reactions and (+Q) heat sign is added on product side.
    8.     (Aq) is written for aqueous solution substances.
    
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