The following are statements regarding sodium carbonatei) The chemical formula of washing soda is Na2CO3.10H2Oii) Aqueous solution of sodium carbonate is acidic in natureiii) The prinicple involved in the preparation of Na2CO3 by Solvay process is very low solubility of NaHCO3.

Washing sida Na2CO3 . 10H2O [Decahydrate of sodium carbonate]Na2CO3 → 2Na+ + CO3-2Na2CO3 salt undergoes anionic hydrolysis  The aqueous solution of Na2CO3 is alkaline (or) basic in natureHint: Ions of weak acid & base only undergoes hydrolysis→ Na2CO3 is prepared by solvay processNH3 + CO2 + H2O → NH4HCO3NH4HCO3 + NaCl → NH4Cl + NaHCO3   → Due to the low solubility of NaHCO3 , it gets precipitated in the reaction of NaCl with NH4HCO3