Question

what will be the nature of the solution when sodium carbonate is dissolve in water​

Answer 1

Explanation:

Answer:

When  you put sodium carbonate (Na2CO3) in water it produces 2 sodium ions  and one carbonate ion (CO3 with a charge of 2-).  Carbonic acid (H2CO3)  is a weak acid and doesn't want to break apart.  So what happens to the  CO3 ion in water is that it picks up one or 2 hydrogen ions to become  H2CO3 or HCO3-.  The only place CO3 can get hydrogen ions from is water.   And if it takes a hydrogen from water (H2O), there will be a hydroxide  ion (OH-) left over.  From the point of equations: 

Na2CO3 ---> 2Na+   +   CO3-- 

CO3-- + H2O ---> HCO3- + OH- 

and 

HCO3- + H2O ---> H2CO3 + OH-