Autoionization is spontaneous reaction of a chemical species with its self. The chemical reaction of water and sulfuric acid is in the explanation.
<h3>What is sulfuric acid?</h3>
Sulfuric acid, often known as oil of vitriol in ancient times, is a mineral acid made up of the elements hydrogen, oxygen, and sulfur, and has the chemical formula H2SO4. It is a viscous liquid that is miscible with water. It has no color or smell.
Due to its strong affinity for water vapor, pure sulfuric acid does not naturally occur on Earth; it is hygroscopic and rapidly collects water vapor from the air. Since concentrated sulfuric acid is a strong oxidant with potent dehydrating effects, it is extremely corrosive to other materials, including rocks and metals. A major exception is that sulfuric acid does not dehydrate phosphorus pentoxide; on the contrary, it dehydrates sulfuric acid into sulfur trioxide.
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