IMP

• Bleaching powder ----- ca(oh)2 + cl2 ----> caocl2 + h2o
• bleachong powder is used for bleaching cotton and linen in the textile industry,for bleaching wood pulp in paper factories and for bleaching washed clothes in laundry
• bleaching powder is an oxidising agent for chemical industry and used to make drinking water free from germs
• Baking soda ---> Sodium bicarbonate (NaHCO3)
• baking soda ----> nacl + h2o + co2 + NH3 -----> Nh4 + NaHco3
• NaHCo3 + any acid ----> co2 + h2o + sodium salt of the acid
• Washing soda ----. na2co3 + 10h2o ----. na2co3 . 10h2o
• Sodium carbonate is used in glass soap and paper industries

  it is used in the manufacture of sodium compounds such as borax

  Sodium carbonate can used for cleaning agent for domestic purpose

  it is used to remove permanent hardness of the water
• on heating gypsum at 373K is loses water molecules and becomes calcium sulphate hemihydrate (Caso4 . 1/2 h2o) this is called plaster of paris
• lime stone + heat --> quick lime
• slaked lime is used in making cement, mortars, plastering materials, white wash etc.
• quick lime + water ---> slaked lime
• caso4 . 1/2 h2o + 1*1/2 h2o ----. caso4 .2h2o