How to Calculate the Equivalent Weight of Na2CO3

Answer: A solution’s equivalent weight is calculated by dividing the solute’s molecular weight by its valence. 

• We must first determine the molecular weight of the various elements that make up the molecule.

• Sodium, carbon and oxygen are the individual elements in Na₂CO₃

• Sodium, Carbon and oxygen have molecular weights of 22, 12 and 16 respectively.

• The molecular weight of Na₂CO₃ can be simply computed.

2 (Na) + (C) + 3(O) 

= 2 (23) + (12) + 3(16)  = 46 + 12 + 48 = 106.  

The sulfuric acid Na₂CO₃‘s molecular mass is 106 g/mol.

Equivalent weight of Na₂CO₃ 

= 106/2 

= 53 g/eq.