Sodium Sulfite

Sodium sulfite is a white crystalline compound with the chemical formula Na2SO3. It is soluble in water and has a slightly alkaline taste. Sodium sulfite is commonly used as a reducing agent, antioxidant, and preservative in various industries such as food, photography, and pulp and paper.

In terms of its molecular structure, sodium sulfite consists of two sodium atoms (Na) covalently bonded to a sulfur atom (S) and three oxygen atoms (O). The bond angles between the sulfur and oxygen atoms are approximately 120 degrees, which is consistent with a trigonal planar geometry.

Upon dissolution in water, sodium sulfite undergoes hydrolysis to produce a mixture of sodium sulfite (Na2SO3), sodium bisulfite (NaHSO3), and sulfurous acid (H2SO3). This equilibrium is pH-dependent and can be shifted towards the production of either sodium bisulfite or sulfurous acid through changes in pH.

Sodium sulfite has several potential hazards associated with its use, including skin and eye irritation upon contact, respiratory irritation upon inhalation, and gastrointestinal distress upon ingestion. It is important to handle sodium sulfite with care and to follow proper safety protocols when using it.