Amphiprotism
| Formula / Notation | e.g., HS⁻ + H₂O ⇌ H₂S + OH⁻ or HS⁻ + H₂O ⇌ H₃O⁺ + S²⁻ |
|---|---|
| Also Known As | Amphoterism (related), amphiprotic substance, ampholyte, zwitterion-forming species |
What is Amphiprotism?
Amphiprotism describes the ability of a substance to act as either a proton donor (acid) or a proton acceptor (base) depending on the reaction conditions. Water is the most common amphiprotic substance, acting as an acid with strong bases and as a base with strong acids. Other amphiprotic species include amino acids and the bicarbonate ion.
Formula & Notation
Other Names / Synonyms: Amphoterism (related), amphiprotic substance, ampholyte, zwitterion-forming species
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Amphiprotism describes the ability of a substance to act as either a proton donor (acid) or a proton acceptor (base) depending on the reaction conditions. Water is the most common amphiprotic substance, acting as an acid with strong bases and as a base with strong acids. Other amphiprotic species include amino acids and the bicarbonate ion.
Amphiprotic species are critical in buffer systems and in biological fluids where they maintain pH homeostasis. Amino acids as amphiprotic compounds act as biological buffers. Understanding amphiprotism guides titration analysis and the design of amphoteric catalysts.
Amphiprotic substances vary widely in hazard. Strong amphiprotic acids (H₂SO₄ first dissociation) are corrosive. Common biological amphiprotic species (amino acids, bicarbonate) are generally safe. Follow standard laboratory safety for handling acidic or basic solutions.
The formula or notation for Amphiprotism is: e.g., HS⁻ + H₂O ⇌ H₂S + OH⁻ or HS⁻ + H₂O ⇌ H₃O⁺ + S²⁻