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protonation |
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protonation (prō`tənā'shən), in chemistry, addition of a proton proton, elementary particle having a single positive electrical charge and constituting the nucleus of the ordinary hydrogen atom. The positive charge of the nucleus of any atom is due to its protons.
..... Click the link for more information. to an atom, molecule, or ion. The proton is the nucleus of the hydrogen hydrogen [Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; at. wt. 1.00794; m.p. −259.14°C;; b.p. −252.87°C;; density 0.08988 grams per liter at STP; valence usually +1. ..... Click the link for more information. atom; the positive hydrogen ion, H+, consists of a single proton. An example of protonation is the formation of the ammonium group ammonium group, in chemistry, a positively charged nitrogen atom joined by single bonds to four other atoms or groups. The simplest ammonium group, NH4+, is formed by protonation of ammonia, NH3, e.g. ..... Click the link for more information. NH4+ from ammonia, NH3. Protonation often occurs in the reaction of an acid with a base to form a salt (see acids and bases acids and bases, two related classes of chemicals; the members of each class have a number of common properties when dissolved in a solvent, usually water. Properties ..... Click the link for more information. ; salts salt, chemical compound (other than water) formed by a chemical reaction between an acid and a base (see acids and bases). Characteristics and Classification of Salts ..... Click the link for more information. ). Protonation differs from hydrogenation hydrogenation , chemical reaction of a substance with molecular hydrogen, usually in the presence of a catalyst. A common hydrogenation is the hardening of animal fats or vegetable oils to make them solid at room temperature and improve their stability. ..... Click the link for more information. in that during protonation a change in charge of the protonated species occurs, whereas the charge is unaffected during hydrogenation. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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