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　　過硫酸鈉的酸堿性以及溶解度

The acidity, alkalinity, and solubility of sodium persulfate

　　過硫酸鈉的酸堿性？

The acid-base properties of sodium persulfate?

　　過硫酸鈉外觀為白色晶狀粉末，無臭味。過硫酸鈉俗稱過二硫酸鈉;高硫酸鈉。其相對密度(水=1)：2.4.其溶解性是溶于水，不溶于乙醇，在潮濕和高溫時能使分解加速;過硫酸鈉呈酸性反應，能被乙醇和銀離子分解;過硫酸鈉也易潮解，在濕空氣中和高溫都能加速過硫酸鈉分解，放出氧而變為焦硫酸鈉。過硫酸鈉具有強氧化性。

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響?

What factors affect solubility?

　　過硫酸鈉溶解度主要受水溫的影響，在水溫為20℃時，過硫酸鈉溶解度為549g/L。溶解度隨著溫度和濕度的升高而上升的。

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.

　　過硫酸鈉在任何溫度下都會被分解，并且過硫酸鈉的分解速度隨著溫度和濕度的升高而加速。過硫酸鈉在加熱180℃時會分解產物：H2SO4、O3、SO2、Na2SO4.過硫酸鈉遇水會分解為硫酸鈉和硫酸：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

　　過硫酸鈉廣泛用于照相業的廢液處理，用作印刷電路板表面金屬的軟蝕劑及紡織用脫漿劑、硫化染料發色劑等。用作油井壓裂液的破膠劑、電池去極化劑及有機高分子乳化聚合引發劑。照相機工藝用于膠片顯影、定影劑;還可用作廢液處理劑、金屬表面處理劑、印刷電路版的蝕刻劑等。

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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