Sodium So"di*um, n. [NL., fr.E. soda.] (Chem.) A common metallic element of the alkali group, in nature always occuring combined, as in common salt, in albite, etc. It is isolated as a soft, waxy, white, unstable metal, so highly reactive that it combines violently with water, and to be preserved must be kept under petroleum or some similar liquid. Sodium is used combined in many salts, in the free state as a reducer, and as a means of obtaining other metals (as magnesium and aluminium) is an important commercial product. Symbol Na ({Natrium}). Atomic weight 22.990. Specific gravity 0.97. [1913 Webster]

{Sodium amalgam}, an alloy of sodium and mercury, usually produced as a gray metallic crystalline substance, which is used as a reducing agent, and otherwise.

{Sodium carbonate}, a white crystalline substance, {Na2CO3.10H2O}, having a cooling alkaline taste, found in the ashes of many plants, and produced artifically in large quantities from common salt. It is used in making soap, glass, paper, etc., and as alkaline agent in many chemical industries. Called also {sal soda}, {washing soda}, or {soda}. Cf. {Sodium bicarbonate}, and {Trona}.

{Sodium chloride}, common, or table, salt, {NaCl}.

{Sodium hydroxide}, a white opaque brittle solid, {NaOH}, having a fibrous structure, produced by the action of quicklime, or of calcium hydrate (milk of lime), on sodium carbonate. It is a strong alkali, and is used in the manufacture of soap, in making wood pulp for paper, etc. Called also {sodium hydrate}, and {caustic soda}. By extension, a solution of sodium hydroxide. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • NAOH — steht für: Natriumhydroxid, ein weißer hygroskopischer Feststoff; in Wasser Natronlauge NA OH steht für: Omaheke, ISO 3166 2 Code der namibischen Region Diese Seite ist eine Begriffsklärung zur …   Deutsch Wikipedia

  • NaOH — Kristallstruktur Na+      …   Deutsch Wikipedia

  • NaOH — Hydroxyde de sodium Pour les articles homonymes, voir soude (homonymie). Hydroxyde de sodium Structure de l hydroxyde de sodium …   Wikipédia en Français

  • NaOH — Ternary Ter na*ry, a. [L. ternarius, fr. terni. See {Tern}, a.] 1. Proceeding by threes; consisting of three; as, the ternary number was anciently esteemed a symbol of perfection, and held in great veneration. [1913 Webster] 2. (Chem.) Containing …   The Collaborative International Dictionary of English

  • NaOH — Caustic Caus tic, Caustical Caus tic*al, a. [L. caustucs, Ge. ?, fr. ? to burn. Cf. {Calm}, {Ink}.] 1. Capable of destroying the texture of anything or eating away its substance by chemical action; burning; corrosive; searing. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • NaOH — …   Википедия

  • NaOH — n. sodium hydroxide, highly caustic alkali used to make acids neutral and make sodium salts …   English contemporary dictionary

  • NaOH — • sodium hydroxide …   Maritime acronyms and abbreviations

  • 脑户 nǎoh (DU17) — 【定位】俯伏坐位。 在头部,后发际正中直上2.5寸,风府上1.5寸,枕外隆凸的上缘凹陷处。 【取法】正坐或俯伏,于头部中线,枕骨粗隆上缘之凹陷处取穴。 【解剖】穴下为皮肤、皮下组织、左、右枕额肌枕腹之间、腱膜下疏松组织。 布有枕大神经的分支和枕动、静脉的分支或属支。 【特异性】督脉、足太阳之会 【功用】醒神开窍、平肝熄风 【主治】头痛头重,面赤目黄,眩晕,瘿瘤,视神经炎。 【刺灸法】平刺0.5~1寸;可灸。 【归经】督脉 …   Human meridian points (人体经络穴位)

  • 脑户 nǎoh (DU17) — 【定位】俯伏坐位。 在头部,后发际正中直上2.5寸,风府上1.5寸,枕外隆凸的上缘凹陷处。 【取法】正坐或俯伏,于头部中线,枕骨粗隆上缘之凹陷处取穴。 【解剖】穴下为皮肤、皮下组织、左、右枕额肌枕腹之间、腱膜下疏松组织。 布有枕大神经的分支和枕动、静脉的分支或属支。 【特异性】督脉、足太阳之会 【功用】醒神开窍、平肝熄风 【主治】头痛头重,面赤目黄,眩晕,瘿瘤,视神经炎。 【刺灸法】平刺0.5~1寸;可灸。 【归经】督脉 …   Human meridian points (人体经络穴位)

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