Class 11 Chemistry The S Block Elements Washing Soda

Washing Soda

  • The chemical name of washing soda is Sodium Carbonate (Na2CO310H2O).

  • It is a whitecrystalline solid existing as dehydrate (Na2CO310H2O).
  • On application of heat decahydrate loses water of crystallizationand form monohydrate which becomes completely anhydrous at a temperature above 373K and forms white powder called soda ash.

Na2CO3.10H2O   --> Na2CO3.H2O + 9H2O

(Sodium carbonate decahydrate)

Na2CO3.H2O      ---> Na2CO3 + H2O

(Sodium carbonate monohydrate)

  • It is used for softening of water, laundering, cleaning, manufacture of glass,soap, borax, paper, paints and textile
  • It is also extensively used as laboratory reagent.

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