| 释义 |
neutralizationenUK
neu·tral·i·za·tion N0073800 (no͞o′trə-lĭ-zā′shən, nyo͞o′-)n.1. a. The act or process of neutralizing.b. The state or quality of being neutralized.2. Chemistry A reaction between an acid and a base, usually yielding a salt and water.neutralizationIn mine warfare, a mine is said to be neutralized when it has been rendered, by external means, incapable of firing on passage of a target, although it may remain dangerous to handle.neutralizationThe reaction of an acid and a base forming a salt and water.Thesaurus| Noun | 1. | neutralization - action intended to keep a country politically neutral or exclude it from a possible war; "the neutralization of Belgium"neutralisationnullification, override - the act of nullifying; making null and void; counteracting or overriding the effect or force of something | | 2. | neutralization - a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form waterneutralisation, neutralisation reaction, neutralization reactionchemical reaction, reaction - (chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water" | | 3. | neutralization - (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation)neutralisationdestruction, devastation - the termination of something by causing so much damage to it that it cannot be repaired or no longer existseuphemism - an inoffensive or indirect expression that is substituted for one that is considered offensive or too harsh | | 4. | neutralization - action intended to nullify the effects of some previous actioncounteraction, neutralisationnullification, override - the act of nullifying; making null and void; counteracting or overriding the effect or force of something |
TranslationsneutralizationenUK
neutralization, chemical reaction, according to the Arrhenius theory of acids and basesacids 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. , in which a water solution of acid is mixed with a water solution of base to form a saltsalt,
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
The most familiar salt is sodium chloride, the principal component of common table salt.
..... Click the link for more information. and water; this reaction is complete only if the resulting solution has neither acidic nor basic properties. Such a solution is called a neutral solution. Complete neutralization can take place when a strong acid, such as hydrochloric acid, HCl, is mixed with a strong base, such as sodium hydroxide, NaOH. Strong acids and strong bases completely break up, or dissociate, into their constituent ions when they dissolve in water. In the case of hydrochloric acid, hydrogen ions, H+, and chloride ions, Cl−, are formed. In the case of sodium hydroxide, sodium ions, Na+, and hydroxide ions, OH−, are formed. The hydrogen and hydroxide ions readily unite to form water. If the number of hydrogen ions in the hydrochloric acid solution is equal to the number of hydroxide ions in the sodium hydroxide solution, complete neutralization occurs when the two solutions are mixed. The resulting solution contains sodium ions and chloride ions that unite when the water evaporates to form sodium chloride, common table salt. In a neutralization reaction in which either a weak acid or a weak base is used, only partial neutralization occurs. In a neutralization reaction in which both a weak acid and a weak base are used, complete neutralization can occur if the acid and the base are equally weak. The heat produced in the reaction between an acid and a base is called the heat of neutralization. When any strong acid is mixed with any strong base, the heat of neutralization is always about 13,700 calories for each equivalent weightequivalent weight.
The equivalent weight of an element or radical is equal to its atomic weight or formula weight divided by the valence it assumes in compounds. The unit of equivalent weight is the atomic mass unit; the amount of a substance in grams numerically equal to the
..... Click the link for more information. of acid and base neutralized. See article on pH; titrationtitration
, gradual addition of an acidic solution to a basic solution or vice versa (see acids and bases); titrations are used to determine the concentration of acids or bases in solution.
..... Click the link for more information. .Neutralization (or neutralization reaction), a chemical reaction between a substance with acidic properties and a substance with basic properties that leads to the loss of characteristic properties of both substances. Neutralization is used to establish such properties of acids as the change in color of some soluble indicator dyes (for example, violet litmus to red) under the action of acids, the catalytic effect on some chemical reactions (for example, the inversion of sugars), the solubilizing effect on active metals (for example, magnesium and zinc), carbonates, and other slightly soluble compounds, and the acid taste of aqueous solutions, as well as the loss of all these properties upon reaction with bases. The most typical neutralization reaction in aqueous solutions takes place between hydrated hydrogen ions (also known as hydronium ions) and hydroxide ions, which are found in strong acids and bases, respectively: H3O+ (or H+ · H2O) + OH- = 2H2O As a result, the concentration of each ion becomes equal to the concentration characteristic of water itself (about 10 gram-ion per liter at room temperature). In the neutralization of a weak acid by a strong base—for example, neutralization of acetic acid by sodium hydroxide; CH3COOH + OH- ⇄ CH3COO- + H2O the reaction does not proceed to conclusion and is reversible, and the concentration of hydroxide ions in the solution is greater than in pure water (basic reaction of the solution). In the neutralization of a weak base by a strong acid, the solution becomes acidic. Thus, in both the above cases, complete neutralization is not achieved, and the hydrogen ion index (pH) of the solution only approaches 7. In nonaqueous solutions with prototropic solvents—that is, solvents that are themselves capable of accepting or donating hydrogen ions (protons)—neutralization in the reaction of an acid and a base is attained when the concentration of the solvated hydrogen ions in the solution becomes equal to their concentration in the pure solvent. In nonprototropic solutions of acids and bases, neutralization is achieved upon attainment of the concentration of cations or anions that is characteristic of the pure solvent. Neutralization reactions are used in the chemical industry and in the treatment of industrial waste, as well as in laboratory practice, especially in chemical analysis. REFERENCESShatenshtein, A. I. Teorii kislot i osnovanii. Moscow-Leningrad, 1949.
Day, M. C, and J. Selbin. Teoreticheskaia neorganicheskaia khimiia, 2nd ed. Moscow, 1971. (Translated from English.)
Gyenes, I. Titrovanie ν nevodnykh sredakh. Moscow, 1971. (Translated from English.)IU. A. KLIACHKO neutralization[‚nü·trə·lə′zā·shən] (chemistry) The process of making a solution neutral (pH = 7) by adding a base to an acid solution, or adding an acid to an alkaline (basic) solution. Also known as neutralization reaction. neutralizationenUK
neu·tral·i·za·tion (nū'trăl-i-zā'shŭn), 1. The change in reaction of a solution from acid or alkaline to neutral by the addition of just a sufficient amount of an alkaline or of an acid substance, respectively. 2. The rendering ineffective of any action, process, or potential. neu·tral·i·za·tion (nū'trăl-ī-zā'shŭn) 1. The change in reaction of a solution from acid or alkaline to neutral by the addition of just a sufficient amount of an alkaline or an acid substance, respectively. 2. The rendering ineffective of any action, process, or potential.
Synonym(s): neutralisation. neutralization1. A technique for determining the power of an ophthalmic lens. It is accomplished by placing a lens of known power and opposite sign in contact with the unknown lens and moved back and forth in a plane perpendicular to the line of sight until the observation of movement (against or with) of the distant image seen through the lenses disappear. The unknown lens will have the opposite power to that which neutralizes this apparent movement. 2. A method of breaking down hydrogen peroxide from a contact lens (mostly soft) following contact lens disinfection to avoid possible irritation to ocular tissues. This can be achieved by rinsing and dilution with saline, by using a solution with an enzyme catalase or a platinum disc incorporated into the lens case, or with a chemical agent such as sodium pyruvate or sodium thiosulfate. See disinfection; focimeter.neu·tral·i·za·tion (nū'trăl-ī-zā'shŭn) 1. The change in reaction of a solution from acid or alkaline to neutral by the addition of a sufficient amount of an alkaline or an acid substance, respectively. 2. The rendering ineffective of any action, process, or potential.
Synonym(s): neutralisation. neutralizationenUK
Related to neutralization: neutralization testSynonyms for neutralizationnoun action intended to keep a country politically neutral or exclude it from a possible warSynonymsRelated Wordsnoun a chemical reaction in which an acid and a base interact with the formation of a saltSynonyms- neutralisation
- neutralisation reaction
- neutralization reaction
Related Words- chemical reaction
- reaction
noun (euphemism) the removal of a threat by killing or destroying it (especially in a covert operation or military operation)SynonymsRelated Words- destruction
- devastation
- euphemism
noun action intended to nullify the effects of some previous actionSynonyms- counteraction
- neutralisation
Related Words |