氢氧化钠（sodium hydroxide）.docVIP

氢氧化钠（sodium hydroxide） Sodium hydroxide, solid dissolved in water and heat; caustic soda, caustic soda, caustic soda, and is a common and important base, English name Sodiun hydroxide (alias Caustic soda). Power: a mouse can be turned into a skeleton in seconds. A movie chainsaw 3 was once used on a female model ________________________________________________________________________ Chemical formula NaOH Formula 40.01. Density 2.130 g / cm 3, melting point 318.4 DEG C, boiling point 1390 DEG C. Sodium (Na) elements are elements eleventh in the periodic table of elements, located in the third cycle of the first A group (the first major group) in the periodic table of the elements, belonging to the alkali metal group (the elements of the group are strongly alkaline, except hydrogen (H) elements). Its outer nuclear electron configuration is 2, 8, 1 (1S2, 2s2, 2p6, 3s1), the outermost 3s1 electron is its valence electron, the Na element is easy to lose 3s1 electron, and forms the positive monovalent sodium ion (Na+), therefore it is the strong gold attribute. The Na element reacts with water (reaction with water, the application of the beaker and stamped with the glass, in the beaker reaction of sodium block floating in the water, the molten globular, swim in the water, a trace of the sound, and has generated a splash), generating strong alkaline solution of NaOH, and hydrogen. NaOH OH O-H solid to covalent bonds with Na and OH with strong ionic bonding, soluble in water, the dissociation degree of nearly 100%, so the solution is strongly alkaline, the colorless phenolphthalein TS turned red, or PH litmus blue etc.. Pure anhydrous sodium hydroxide is a white translucent crystalline solid. Sodium hydroxide is easily soluble in water, and its solubility increases with the increase of temperature. When dissolved, it can emit a large amount of heat. Its water solution is astringent and soapy, in alkaline solution, with all the characteristics of alkali. Commercially availa