Sodium Metabisulfite Reaction With Acid

When sodium metabisulfite reacts with an acid, the following reaction occurs:

Na2S2O5 + 2H+ → 2Na+ + 2SO2 + H2O

In this reaction, the sodium metabisulfite (Na2S2O5) reacts with hydrogen ions (H+) from the acid to produce sodium ions (Na+), sulfur dioxide gas (SO2), and water (H2O).

It is important to note that this reaction is a redox reaction, which involves the transfer of electrons between the reactants. In this case, the sulfur in the sodium metabisulfite undergoes oxidation, while the hydrogen ions undergo reduction.

Additionally, it is important to handle sodium metabisulfite with care as it can be hazardous if ingested or inhaled. It should be stored in a cool, dry place away from incompatible materials, and handled using appropriate protective equipment.