Sangita magar acid attacked in nepal
Sangita magar acid attacked in nepal
There are two closely related definitions that apply to acids as described above: the Arrhenius definition and the Brønsted-Lowry definition; a third, the Lewis definition, is only tangentially related.The Arrhenius definition defines acids as substances which increase the concentration of hydrogen ions , or more accurately, hydronium ions when dissolved in water. The Brønsted-Lowry definition is an expansion to include solvents other than water: an acid is a substance which can act as a proton donor. By this definition, any compound which can be deprotonated can be considered an acid. Examples include alcohols and amines which contain O-H or N-H fragments. A Lewis acid is a substance that can accept a pair of electrons to form a covalent bond. Examples of Lewis acids include all metal cations, and electron-deficient molecules such as boron trifluoride and aluminium trichloride. Many Lewis acids are not Arrhenius or Brønsted-Lowry acids, and vice versa. "An acid" is implicitly an Arrhenius or Brønsted-Lowry acid and not a Lewis acid, since chemists almost always refer to a Lewis acid explicitly as "a Lewis acid".
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