Wednesday, 14 December 2016

Sulphuric Acid

 USES OF SULPHURIC ACID

  • To make fertilisers
  • To make soaps and detergent 
  • To make pesticides 
  • To make paints
  • To make synthetic fibres
  • To darken the colour of leather product


MANUFACTURING OF SULPHURIC ACID

STAGE I à TO PRODUCE SULPHUR OXIDE , SO2

-     Sulphur is burned in dry air to produce Sulphur dioxide
-     Chemical equation : S +o2 à so2



STAGE II à TO PRODUCE SULPHUR TRIOXIDE , SO3     

-     A mixture of Sulphur dioxide gas & air is passed over vanadium(v) oxide , V2o5 which is used as a catalyst at a temperature of 450o c  500o c and under the pressure of q atm.
-     Chemical equation : 2so2 + O2   2SO3


STAGE III à TO PRODUCE SULHURIC ACID , H2SO4

-     Sulphur trioxide is dissolved in concentrated sulhuric acid to produce oleum, H2S2O7
-     Chemical equation : SO3 + H2SO4  à H2S2O7
-     Oleum is dissolved in water to produce sulphuric acid
-     Chemical equation : H2S2O7 + H2O à 2H2SO4


CONTACT PROCESS















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