
[化學] 結晶水
In color like water drops in the crystallization of emotional sigh.
在水珠般的色彩裡凝聚着情感的歎息。
Water of crystallization of barium chloride was determined more rapidly more simply and more accurately by the application of microwave heating technigue.
在微波輻射下準确測定了*********中結晶水的含量。
First, we heat the gypsum serofluid, causing it to flow, while the dehydration of crystallization water and the formation of hemi-hydrated gypsum crystal will be taken place at the same time.
首先,加熱石膏漿液,并使之流動,同時脫除結晶水并形成半水石膏結晶。
METHODS Puerarin was separated by means of water extracting, organic solvent purification and following acid water crystallization. The content of puerarin was determined by TLC-scanning method.
方法水提取後用有機溶劑萃取,再用酸水結晶來提取分離葛根素,并采用薄層掃描法對其含量進行測定。
Researchers are seeking to define the proper water temperature, pressure, and flow rate, as well as the effect of internal water quenching on resin crystallization and molded part properties.
研究人員正在試圖确定水溫、流量、零件腔内水的冷卻作用對樹脂結晶和注射件性能的影響。
The molecular dynamics simulation was adopted to investigate the crystallization in water solution under the conditions of various magnetic fields and temperatures.
采用分子動力學模拟方法對不同磁場、溫度條件下水溶液的結晶過程進行了模拟研究。
The salt formation and crystallization process of cefoperazone with sodium bicarbonate in water and acetone were reported.
優化了頭孢哌酮酸和碳酸氫鈉的成鹽、析晶等工藝條件,制備了頭孢哌酮鈉。
The fundamentals of ammonia recovery from sour waste water treating in refineries by using crystallization-adsorption was presented.
介紹了結晶-吸附法精制煉油廠酸性污水回收氨氣的基本原理。
Using a laser monitoring observation technique, the solubilities and crystallization metastable zone of DL-p-hydroxyphenylglycine in water-acetone solvent are determined.
利用激光監視裝置,測定了對*********甘氨酸硫酸鹽在水-丙酮-酸度溶液中的溶解度和結晶介穩區。
The result showed that the cooling water temperature had a crucial role on the crystallization, morphology and tensile strength of PP films.
結果表明:冷卻水溫度變化對生産PP薄膜的結晶、形态和拉伸性能有很大影響。
It introduces the methods of recovering waste acid and water with waste acid and oily impurity using the natural cooling crystallization, the dialyzing diffusing and roasting.
介紹用自然冷卻結晶法、滲析擴散法和焙燒法回收廢酸及合廢酸、含石油類雜質廢水的處理方法。
It is shown that butynediol and water can orm stable supersaturated solution, and the crystallization yields are often low on account of he high solubility of the crystals.
發現************與水可形成比較穩定的過飽和溶液,介穩區較寬,屬于低産率的結晶體系;
The results showed that carnallite dissolved in the water was a process that potassium chloride dissolved firstly and then KC1 crystallization appeared when certain supersaturation of KC1 was got.
研究結果表明:光鹵石溶解制*********結晶機理為:*********是先溶解後結晶的過程,即KC1先溶解到溶液中,當溶液中KC1達到一定過飽和度後再從溶液中結晶析出。
The cooling crystallization kinetics of heliotropine in pure ethanol and in the mixture solvent of ethanol and water with different volume ratio were measured experimentally by batch dynamic method.
采用間歇動态法分别測定了*********在無水乙醇及不同配比的乙醇-水溶劑體系中冷卻結晶的動力學。
A series of water- borne polyurethanes were synthesized, and the effect of PEG content in soft- segment on the crystallization of their cast films was stu***d.
合成了系列水性聚氨酯分散液,就分子鍊軟段中親水性鍊段聚乙二醇(PEG)含量對聚氨酯塗膜結晶性的影響進行了探讨。
If crystallization occurs, use water bath heating to dissolve it, which will not affect the performance of product.
發生結晶時隻需用水浴加熱溶解,不影響使用效果。
Basic zinc chloride is made by crystallization. It has low contamination of mineral elements, low hygroscopic and insolubility in water.
堿式*********是結晶粉末,是一種低污染的礦物元素,不易吸潮也不溶于水。
Should have excellent penetration crystallization activity, tiny cracks of concrete have automatic repair function, where there is water automatic repair function is reactivated.
具有優異的滲透結晶活性,對混凝土微裂縫有自動修複功能,在有水時自動修複功能被重新激活。
Methods The method of cervical mucus crystallization was used to examine estrous and estrus cycle of mice exposed to chronic different As2O3 drinking water.
方法采用宮頸黏液結晶法對不同濃度慢性砷暴露小鼠動情周期和動情期進行檢查。
The crystallization behavior is affected by the concentration and cooling rate simultaneously when the solution is cooled. The freezable water of …
降溫過程中的結晶熱可用來确定溶液降溫後的凍結水含量以及最大凍結濃縮溶液中的水分含量。
The separation of o-chlorobenzoic acid and p-chlorobenzoic acid is stu***d by dissociation extractive crystallization based on their differences in solubilities and dissociation constants in water.
根據兩種酸在水中溶解度和離解常數的差異,采用堿性萃取劑離解萃取結晶分離對氯苯甲酸,制得高純度的對氯苯甲酸産品。
The crystallization wheel (1) and the steel belt (6) are both provided with circulating water cooling devices, so that the high-speed casting of light section blank can be realized.
結晶輪(1)及鋼帶(6)都有循環水冷裝置,故可實現小斷面坯料的高速澆鑄。
結晶水(water of crystallization)是指以特定化學計量比例存在于晶體結構中的水分子,通過與化合物中的離子或分子形成配位鍵或氫鍵結合。這類水分子是晶體結構的重要組成部分,通常會在加熱時脫離,導緻晶格結構改變或物質分解。
以硫酸銅晶體(CuSO₄·5H₂O)為例,其結構中5個水分子分别與銅離子形成配位鍵或填充晶格間隙。這些水分子對晶體的顔色、密度和穩定性具有決定性作用:無水硫酸銅為白色粉末,而含結晶水的形态呈現藍色晶體(來源:國際純粹與應用化學聯合會術語庫)。
結晶水的特性包括:
此類現象在分析化學、材料科學和地質學領域具有重要應用價值,英國皇家化學會《晶體工程期刊》的多篇研究證實,結晶水的存在狀态直接影響着物質的溶解度和催化性能。
“Water of crystallization”(結晶水)是指結合在晶體化合物中的水分子,其存在形式與液态水不同,具有以下特點:
化學結合性
結晶水通過化學鍵與晶體結構中的其他成分結合,通常以确定的化學計量比存在。例如,硫酸銅晶體(CuSO₄·5H₂O)中每1個CuSO₄分子對應5個水分子。
結構穩定性
這些水分子在晶格中占據固定位置,對維持晶體結構穩定性起關鍵作用。移除結晶水可能導緻晶體結構破壞,例如無水硫酸銅(CuSO₄)為白色粉末,而有水合物呈藍色。
與“遊離水”的區别
結晶水不同于物理吸附的遊離水(如潮濕環境中的水分),後者不參與化學計量且易揮發。結晶水需通過加熱等特定條件才能脫去。
應用領域
在化學分析中,測定結晶水含量是确定化合物組成的重要方法。例如,通過加熱樣品至恒重,計算質量差可推斷結晶水比例。
總結來說,結晶水是晶體化合物的固有組成部分,其存在直接影響物質的性質(如顔色、溶解度)。相關術語“anhydrous”(無水的)則指不含結晶水的化合物狀态。
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