Laboratory Preparation of Sodium, Trioxocarbonate(IV) (Soda Ash)

Sodium trioxocarbonate (IV) is prepared in the laboratory by heating sodium hydrogen trioxocarbonate (IV).

 2NaHCO_3(aq)\(\overset{heat}{\normalsize \rightarrow}\) Na₂CO_3(g) + H₂O_(l) + CO_2(g)

On crystallization with ten molecules of water, washing soda is formed;

 Na₂CO₃ + 10H₂O → Na₂CO₃.10H₂O

Laboratory Preparation of Na₂CO₃ by Passing CO₂ through a Solution of NaOH (Soda ash):

Na₂CO₃ is prepared by passing CO₂ through a solution of NaOH.