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The Bunsen reaction is a chemical reaction that describes water, sulfur dioxide, and iodine reacting to form sulfuric acid and hydrogen iodide: . 2H 2 O + SO 2 + I 2 → H 2 SO 4 + 2HI ...
Sulfurous acid is commonly known to not exist in its free state, and due to this, it is stated in textbooks that it cannot be isolated in the water-free form. [4] However, the molecule has been detected in the gas phase in 1988 by the dissociative ionization of diethyl sulfite. [5]
Sulfur dioxide (IUPAC-recommended spelling) or sulphur dioxide (traditional Commonwealth English) is the chemical compound with the formula S O 2.It is a colorless gas with a pungent smell that is responsible for the odor of burnt matches.
Although nearly 100% sulfuric acid solutions can be made, the subsequent loss of SO 3 at the boiling point brings the concentration to 98.3% acid. The 98.3% grade, which is more stable in storage, is the usual form of what is described as "concentrated sulfuric acid".
The elementary reaction responsible for water quantification in the Karl Fischer titration is oxidation of sulfur dioxide (SO 2) with iodine: . H 2 O + SO 2 + I 2 → SO 3 + 2 HI. This elementary reaction consumes exactly one molar equivalent of water vs. iodine.
Disulfuric acid (alternative spelling disulphuric acid) or pyrosulfuric acid (alternative spelling pyrosulphuric acid), also named oleum, is a sulfur oxoacid. [3] It is a major constituent of fuming sulfuric acid, oleum, and this is how most chemists encounter it.
Calcium sulfite, or calcium sulphite, is a chemical compound, the calcium salt of sulfite with the formula CaSO 3 ·x(H 2 O). Two crystalline forms are known, the hemihydrate and the tetrahydrate, respectively CaSO 3 ·½(H 2 O) and CaSO 3 ·4(H 2 O). [2]
Sodium thiosulfate is used in the treatment of cyanide poisoning. [3] It is on the World Health Organization's List of Essential Medicines. [4] [5] Other uses include topical treatment of ringworm and tinea versicolor, [3] [6] and treating some side effects of hemodialysis [7] and chemotherapy.