This is an acid-base reaction (neutralization): Na2O is a base, SO2 is an acid.
Reactants:
- Na2O – Sodium oxide
- Other names: Disodium oxide
, Sodium monoxide
, Disodium monoxide
- Appearance: White solid
; White lumps or powder
- Other names: Disodium oxide
- SO2 – Sulfur dioxide
- Other names: Sulfurous anhydride
, Sulphur dioxide
, Sulfurous acid anhydride
- Appearance: Colorless gas
; Colourless gas or compressed liquefied gas with pungent odour
; Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.]
- Other names: Sulfurous anhydride
Products:
- Na2SO3 – Sodium sulfite
- Other names: Sodium sulphite
, Hypo clear (photography)
, E221
- Appearance: White solid
; White crystals or powder
- Other names: Sodium sulphite
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