過(guò)硫酸鈉外觀為白色晶狀粉末，無(wú)臭味。過(guò)硫酸鈉俗稱過(guò)二硫酸鈉；高硫酸鈉。其相對(duì)密度（水=1）：2.4，其溶解性是溶于水，不溶于乙醇，在潮濕和高溫能使分解加速；能被乙醇和銀離子分解，在20℃時(shí)水中溶解度為549g/L；過(guò)硫酸鈉也易潮解，在濕空氣中和高溫都能加速過(guò)硫酸鈉分解，放出氧而變?yōu)榻沽蛩徕c。過(guò)硫酸鈉具有強(qiáng)氧化性。
Sodium persulfate is white crystalline powder with no odor. Sodium persulfate is 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 it can accelerate the decomposition in damp and high temperature; It can be decomposed by ethanol and silver ions, and the solubility in water is 549g/L at 20 ℃; Sodium persulfate is also easy to deliquescence, which can accelerate the decomposition of sodium persulfate in humid air and high temperature, and release oxygen to become sodium pyrosulfate. Sodium persulfate has strong oxidation.
過(guò)硫酸鈉質(zhì)量好換
Sodium persulfate is of good quality
過(guò)硫酸鈉是由過(guò)硫酸銨與硫酸鈉和硫酸進(jìn)行復(fù)分解反應(yīng)制得的，檢驗(yàn)過(guò)硫酸鈉質(zhì)量好壞的標(biāo)準(zhǔn)，主要看其合成所用的原料。
Sodium persulfate is prepared by the double decomposition reaction of ammonium persulfate, sodium sulfate and sulfuric acid. The standard for testing the quality of sodium persulfate mainly depends on the raw materials used for its synthesis.
在通風(fēng)柜中，將43g Na?CO?·10H?O與34g (NH?)?S?O?混合并研磨成糊狀體，為了除去氨，可將混合物加熱40～50℃，或者通入不含CO?的空氣。然后用玻璃砂芯漏斗將結(jié)晶體抽干，并放在暗處干燥。
In the fume hood, mix 43g of Na ∈ CO ｜ · 10H ∈ O with 34g of (NH ?) ∈ S ∈ O ? and grind them into a paste. To remove ammonia, heat the mixture to 40~50 ℃, or introduce air free of CO ∈. Then, use a glass sand core funnel to drain the crystals and dry them in a dark place.
用氫氧化鈉代替碳酸鈉可以制得更純的過(guò)硫酸鈉。在500mL的圓底燒瓶中放入122g(NH?)?S?O?和100mL濃度為33%的NaOH溶液。將燒瓶與真空泵相連，稍稍加熱，在30～40℃的溫度下使氨和水蒸出。在溶液體積減原來(lái)的一半后，將溶液冷卻，用玻璃砂芯漏斗將結(jié)晶抽干，并在30～40℃下干燥1～2h。c
A more pure sodium persulfate can be prepared by replacing sodium carbonate with sodium hydroxide. In a 500mL round bottom flask, put 122g (NH ?) ∈ S ∈ O ? and 100mL of 33% NaOH solution. Connect the flask to the vacuum pump, heat it slightly, and evaporate the ammonia and water at 30-40 ℃. After the solution volume is reduced to half of the original volume, the solution is cooled, the crystal is pumped out with a glass sand core funnel, and dried at 30-40 ℃ for 1-2 hours. c
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