过硫酸钠的酸碱性以及溶解度

The acidity, alkalinity, and solubility of sodium persulfate

　　过硫酸钠的酸碱性？

The acid-base properties of sodium persulfate?

　　过硫酸钠外观为白色晶状粉末，无臭味。过硫酸钠俗称过二硫酸钠;高硫酸钠。其相对密度(水=1)：2.4.其溶解性是溶于水，不溶于乙醇，在潮湿和高温时能使分解加速;过硫酸钠呈酸性反应，能被乙醇和银离子分解;过硫酸钠也易潮解，在湿空气中和高温都能加速过硫酸钠分解，放出氧而变为焦硫酸钠。过硫酸钠具有强氧化性。

Sodium persulfate appears as a white crystalline powder with no odor. Sodium persulfate, commonly known as sodium persulfate; High sodium sulfate. Its relative density (water=1): 2.4. Its solubility is soluble in water, insoluble in ethanol, and can accelerate decomposition in humid and high temperatures; Sodium persulfate exhibits an acidic reaction and can be decomposed by ethanol and silver ions; Sodium persulfate is also prone to deliquescence, and can accelerate its decomposition in humid air and high temperatures, releasing oxygen and becoming sodium pyrosulfate. Sodium persulfate has strong oxidizing properties.

　　溶解度受哪些因素影响?

What factors affect solubility?

　　过硫酸钠溶解度主要受水温的影响，在水温为20℃时，过硫酸钠溶解度为549g/L。溶解度随着温度和湿度的升高而上升的。

The solubility of sodium persulfate is mainly affected by water temperature. When the water temperature is 20 ℃, the solubility of sodium persulfate is 549g/L. The solubility increases with the increase of temperature and humidity.

　　过硫酸钠在任何温度下都会被分解，并且过硫酸钠的分解速度随着温度和湿度的升高而加速。过硫酸钠在加热180℃时会分解产物：H2SO4、O3、SO2、Na2SO4.过硫酸钠遇水会分解为硫酸钠和硫酸：Na2S2O7+H2O=Na2SO4+H2SO4.

Sodium persulfate will decompose at any temperature, and the decomposition rate of sodium persulfate will accelerate with the increase of temperature and humidity. When heated to 180 ℃, sodium persulfate will decompose into products such as H2SO4, O3, SO2, and Na2SO4. When sodium persulfate comes into contact with water, it will decompose into sodium sulfate and sulfuric acid: Na2S2O7+H2O=Na2SO4+H2SO4

　　过硫酸钠广泛用于照相业的废液处理，用作印刷电路板表面金属的软蚀剂及纺织用脱浆剂、硫化染料发色剂等。用作油井压裂液的破胶剂、电池去极化剂及有机高分子乳化聚合引发剂。照相机工艺用于胶片显影、定影剂;还可用作废液处理剂、金属表面处理剂、印刷电路版的蚀刻剂等。

Sodium persulfate is widely used in the treatment of waste liquids in the photography industry, as a soft etchant for surface metals on printed circuit boards, a desizing agent for textiles, and a coloring agent for sulfide dyes. Used as a gel breaker, battery depolarizer, and organic polymer emulsion polymerization initiator for oil well fracturing fluids. Camera technology is used for film development and fixing agents; It can also be used as a waste liquid treatment agent, metal surface treatment agent, etchant for printed circuit boards, etc.

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