Write chemical formula of washing soda. How is it obtained from baking soda ? List two uses of washing soda.
Write chemical formula of washing soda. How is it obtained from baking soda ? List two uses of washing soda.
Solution
Na2CO3.10H2O
When baking soda is heated sodium carbonate is obtained and recrystallisation of sodium carbonate gives washing soda. /
2 NaHCO3 $\xrightarrow{\text{heat}}$ Na2CO3 + H2O + CO2
Na2CO3 +10 H2O → Na2CO3.10 H2O
Uses:
(i)In glass / soap / paper industry
(ii)In manufacture of borax
(iii)As cleansing agent for domestic purpose
(iv)Removing permanent hardness of water
(Any Two)