Na2O + BaSO4 → Na2SO4 + BaO
Reactants:
- Na2O – Sodium oxide



- Other names: Disodium oxide


, Sodium monoxide
, Disodium monoxide 
- Appearance: White solid
; White lumps or powder 
- BaSO4
- Names: Barium sulfate



, Artificial barite 

, Barite 
Barium salt of sulfuric acid 
, Barytes
, BaSO4
, Barium sulphate
, Blanc fixe
, Barytes (natural) 
- Appearance: White crystalline
; Odourless tasteless white or yellowish crystals or powder
; White or yellowish, odorless powder. 
Products:
- Na2SO4
- Names: Sodium sulfate


, Sodium sulphate 
, Sulfate of sodium
Thenardite (mineral)
, Glauber's salt (decahydrate)
, Sal mirabilis (decahydrate)
, Mirabilite (decahydrate mineral)
, Disodium sulfate 

, Anhydrous sodium sulfate
, Sodium sulfate anhydrous 
, Sodium sulfate, anhydrous
, Sodium sulphate anhydrous
, Sodium sulphate, anhydrous
, Sulfuric acid disodium salt, anhydrous
, Disodium sulphate
, Salt cake
, Na2SO4
, Sulfuric acid disodium salt 
- Appearance: White crystalline solid | hygroscopic
; White hygroscopic solid in various forms 
- BaO
- Names: Barium oxide


, Barium monoxide 
, Barium protoxide 
Calcined baryta 
, Baria 
- Appearance: White solid
; Yellowish-white solid in various forms 