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Factors Affecting Solubility04:01

Factors Affecting Solubility

33.5K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
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Solubility Equilibria: Overview01:09

Solubility Equilibria: Overview

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When a substance such as sodium chloride is added to water, it dissolves, forming an aqueous solution. The extent of dissolution is called solubility. The process of dissolution can exist in equilibrium, just like other chemical processes. Solubility equilibria are also called precipitation equilibria because the process of solubility can be reversible. The reverse of the solubility process is called precipitation.
Solubility is important in biological and environmental processes. A notable...
694
Retarders01:19

Retarders

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Retarders are chemical admixtures designed to extend the setting time, which is especially useful when there is a delay in sequential concrete pours to prevent cold joints and to achieve a cohesive structure. Retarders, when used in appropriate amounts, can also enhance the architectural appearance of exposed aggregate finishes.
The function of retarders is to delay the setting of concrete, and this effect can be measured using a penetration test. The retardation process involves adding...
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Precipitation Reactions03:10

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In a precipitation reaction, aqueous solutions of soluble salts react to give an insoluble ionic compound – the precipitate. The reaction occurs when oppositely charged ions in solution overcome their attraction for water and bind to each other, forming a precipitate that separates out from the solution. Since such reactions involve the exchange of ions between ionic compounds in aqueous solution, they are also referred to as double displacement, double replacement, exchange reactions, or...
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Efflorescence in Masonry01:25

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Efflorescence in masonry walls appears as a fluffy crystalline powder, often white, resulting from water-soluble salts within the masonry or mortar. When water penetrates the masonry, it dissolves these salts and brings them to the surface, where they are deposited upon evaporation of water.
While initial efflorescence is common post-construction and can be cleaned with water and a brush, in certain instances, efflorescence can reappear and gradually diminish over time as salts are leached out...
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相关实验视频

Updated: Jul 13, 2025

Detection and Removal of Tooth-Colored Composite Resin Using the Fluorescence-Aided Identification Technique
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表面涂料剂应用后,修复材料释放的化物.

Anamika Parashar1, Yogesh Kumar Sharma2, Sumit Kumar3

  • 1Department of Conservative Dentistry and Endodontics, DR. B.R. Ambedkar Institute of Dental Sciences and Hospital, Patna, Bihar, India.

Bioinformation
|October 12, 2023
PubMed
概括

这项研究评估了玻璃离子水泥 (GIC) 和,有或没有表面涂层的离子排放. 这两种牙科材料都显示出化物释放,无论保护表面的应用如何.

关键词:
化物的化物.修复材料 修复材料 修复材料表面涂层剂的表面涂层剂.

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科学领域:

  • 牙科材料科学 牙科材料科学
  • 生物材料是一种生物材料.
  • 化物化学 化物化学

背景情况:

  • 牙修复材料容易受到损坏.
  • 表面覆盖试剂可以保护牙修复性物质.
  • 评估化物排放对于材料的有效性至关重要.

研究的目的:

  • 为了比较常规玻璃离子水泥 (GIC) 和Zirconomer的离子排放.
  • 评估表面涂料 (油和G-Coat) 对化物排放的影响.
  • 为了确定表面保护是否影响这些牙科水泥的化物释放能力.

主要方法:

  • 建立了两个实验类别:GIC的A类和Zirconomer的B类.
  • 为每个类别准备了60个圆盘形原型 (6x2毫米).
  • 标本被分为三个子类别 (每个n=20):没有涂层 (A1,B1),G涂层 (A2,B2) 和油 (A3,B3).
  • 在所有组中,随着时间的推移测量了离子排放量.

主要成果:

  • 在A1和A3分类中,随着时间的推移,离子排放量持续下降.
  • 小类别A2从第1天到第5天的化物排放量初步增加,随后下降.
  • 无论是GIC还是Zirconomer,在所有测试条件下都显示出化物排放,包括那些表面涂层的条件.

结论:

  • 传统的玻璃离子水泥 (GIC) 和石都会产生离子排放.
  • 表面涂料,包括油和G-Coat,并不能完全防止这些材料释放化物.
  • 这些发现表明,化物排放是这些牙科水泥的固有特性,不管保护性表面处理如何.