Difference between revisions of "Acid"
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| − | An '''acid''' is a [[molecule]] that donates H<sup>+</sup> [[ions]] ([[proton]]s) in a chemical reaction. Acids taste sour (although, in a laboratory, '''never''' taste an acid; they can be highly corrosive) and turn blue [[litmus paper]] red. Acids are covalent compounds, but when dissolved in [[water]], they will conduct electricity. When an acid is put into water, it will loose its H<sup>+</sup>, a process called aqueous dissonance. [[Strong acid]]s are those that completely give up their protons in solution, whereas [[weak acid]]s reach an equilibrium concentration of H<sup>+</sup> in solution. Many [[organic molecule]]s that play important roles in biological processes are also acids, such as [[amino acid]]s and [[carboxylic acid]]s. | + | An '''acid''' is a [[molecule]] that creates H<sup>+</sup> and H<sub>3</sub>O<sup>+</sup> ions in water (according to the Arrhenius definition), that donates H<sup>+</sup> [[ions]] ([[proton]]s) in a chemical reaction (according to the Bronsted-Lowry definition), or that accepts an electron pair in a reaction(according to the Lewis definition). Acids taste sour (although, in a laboratory, '''never''' taste an acid; they can be highly corrosive) and turn blue [[litmus paper]] red. Acids are covalent compounds, but when dissolved in [[water]], they will conduct electricity. When an Arrhenius acid is put into water, it will loose its H<sup>+</sup>, a process called aqueous dissonance. [[Strong acid]]s are those that completely give up their protons in solution, whereas [[weak acid]]s reach an equilibrium concentration of H<sup>+</sup> in solution. Many [[organic molecule]]s that play important roles in biological processes are also acids, such as [[amino acid]]s and [[carboxylic acid]]s. |
==See Also== | ==See Also== | ||
Revision as of 05:18, March 30, 2008
An acid is a molecule that creates H+ and H3O+ ions in water (according to the Arrhenius definition), that donates H+ ions (protons) in a chemical reaction (according to the Bronsted-Lowry definition), or that accepts an electron pair in a reaction(according to the Lewis definition). Acids taste sour (although, in a laboratory, never taste an acid; they can be highly corrosive) and turn blue litmus paper red. Acids are covalent compounds, but when dissolved in water, they will conduct electricity. When an Arrhenius acid is put into water, it will loose its H+, a process called aqueous dissonance. Strong acids are those that completely give up their protons in solution, whereas weak acids reach an equilibrium concentration of H+ in solution. Many organic molecules that play important roles in biological processes are also acids, such as amino acids and carboxylic acids.