2 HCl (aq) + Na2SO3 (aq) → SO2 (aq) + 2 NaCl (aq) + H2O (l)
This is an acid-base reaction (neutralization): HCl is an acid, Na2SO3 is a base.
Reactants:
- HCl – Chlorane , Hydrogen chloride
- Other names: Hydrochloric acid , M , Uriatic acid
- Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]
- Na2SO3 – Sodium sulfite
Products:
- 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.]
- NaCl – Sodium chloride
- H2O – Water, oxidane