polar substance

简明释义

有极性物质

英英释义

例句

1.Water is a common polar substance that dissolves many ionic and molecular compounds.

水是一种常见的极性物质，能够溶解许多离子和分子化合物。

2.The polar substance in soap helps to break down grease and dirt.

肥皂中的极性物质有助于分解油脂和污垢。

3.In chemistry, understanding the properties of a polar substance is essential for predicting solubility.

在化学中，理解极性物质的性质对于预测溶解度至关重要。

4.Salt, when mixed with water, dissociates into ions due to the polar substance nature of water.

盐与水混合时，由于水的极性物质特性而离解为离子。

5.Alcohol is another example of a polar substance that can mix with water.

酒精是另一个可以与水混合的极性物质的例子。

作文

In the realm of chemistry, understanding different types of substances is crucial for grasping how various reactions occur and how different materials interact with one another. One important category of substances is known as a polar substance, which plays a significant role in many chemical processes. A polar substance is characterized by its molecular structure that results in an uneven distribution of electron density. This causes the molecule to have a slight electrical charge, leading to the formation of positive and negative poles within the same molecule. Water, for example, is a classic polar substance due to its bent shape and the difference in electronegativity between oxygen and hydrogen atoms.The significance of polar substances can be observed in various everyday phenomena. For instance, the ability of water to dissolve many ionic compounds and other polar substances is essential for biological systems. This property is often summarized by the phrase "like dissolves like," meaning that polar substances tend to dissolve well in other polar substances but not in non-polar substances. This principle is fundamental in fields such as biochemistry, where the solubility of nutrients and waste products in bodily fluids is crucial for life.Furthermore, the unique properties of polar substances lead to interesting behaviors in nature. For example, the high boiling point of water compared to other similar-sized molecules can be attributed to hydrogen bonding, which occurs between water molecules due to their polar nature. These bonds require significant energy to break, which explains why water remains liquid over a wide range of temperatures, making it an excellent solvent and medium for life.In contrast, non-polar substances, which do not exhibit this uneven charge distribution, behave differently. Oils and fats are examples of non-polar substances that do not mix with water. This distinction is vital in understanding processes such as emulsification, where an emulsifier is needed to stabilize mixtures of polar and non-polar substances, such as oil and water. Emulsifiers have a polar head and a long non-polar tail, allowing them to interact with both types of substances and create a stable mixture.The study of polar substances also extends to environmental science. The behavior of pollutants in water bodies can depend on their polar or non-polar nature. For example, heavy metals and many organic compounds are often non-polar and can accumulate in sediments, while polar substances are more likely to remain dissolved in water. Understanding these interactions helps in developing strategies for pollution control and remediation.In conclusion, polar substances are integral to a myriad of chemical and biological processes. Their unique properties, derived from their molecular structures, enable them to interact with other substances in ways that are essential for life and the environment. By studying polar substances, we gain insights into everything from basic chemistry to complex ecological systems. This knowledge not only enriches our understanding of the natural world but also informs practical applications in medicine, environmental science, and industry.

在化学领域，理解不同类型的物质对于掌握各种反应的发生以及不同材料之间的相互作用至关重要。一个重要的物质类别被称为极性物质，它在许多化学过程中扮演着重要角色。极性物质的特征在于其分子结构导致电子密度的不均匀分布。这使得分子具有轻微的电荷，从而在同一分子内形成正负极。例如，水就是一个经典的极性物质，因为它的弯曲形状以及氧和氢原子之间的电负性差异。极性物质的重要性可以在日常现象中观察到。例如，水能够溶解许多离子化合物和其他极性物质的能力对于生物系统至关重要。这种特性通常用“相似的溶解相似的”这句话来总结，意味着极性物质倾向于在其他极性物质中良好溶解，但在非极性物质中则不然。这一原则在生物化学等领域是基础，因为营养物质和废物在体液中的溶解性对生命至关重要。此外，极性物质的独特性质导致自然界中出现有趣的行为。例如，水的沸点高于其他类似大小的分子的原因可以归因于氢键的形成，这种键发生在水分子之间，源于它们的极性特性。这些键需要大量能量才能打破，这解释了为什么水在广泛的温度范围内保持液态，使其成为优秀的溶剂和生命的介质。相比之下，不具有这种不均匀电荷分布的非极性物质表现得不同。油和脂肪是非极性物质的例子，它们与水不混合。这种区别在理解乳化过程时至关重要，在乳化过程中，需要一种乳化剂来稳定极性和非极性物质（如油和水）的混合物。乳化剂具有一个极性头部和一个长的非极性尾部，使它们能够与两种类型的物质相互作用，从而形成稳定的混合物。对极性物质的研究还扩展到环境科学。污染物在水体中的行为可能取决于其极性或非极性特性。例如，重金属和许多有机化合物通常是非极性的，并可能在沉积物中积累，而极性物质更可能保持在水中溶解。理解这些相互作用有助于制定污染控制和修复的策略。总之，极性物质在无数化学和生物过程中是不可或缺的。它们独特的性质源于其分子结构，使它们能够以对生命和环境至关重要的方式与其他物质相互作用。通过研究极性物质，我们可以深入了解从基本化学到复杂生态系统的一切。这种知识不仅丰富了我们对自然世界的理解，还为医学、环境科学和工业的实际应用提供了信息。