undissociated

简明释义

英[ˌʌnˈdɪsəˌseɪtɪd]美[ˌʌnˈdɪsəˌseɪtɪd]

adj. [化学] 未离解的，不游离的

英英释义

单词用法

同义词

反义词

例句

1.Lactic acid and acetic acid showed an inhibitory effect toward bacillus subtilis if the undissociated form was more than0.683% and0.256%, respetively.

当乳酸和醋酸其未解离部分的浓度分别大于0.683%0.256%对枯草芽胞杆菌有抑菌作用。

2.Lactic acid and acetic acid showed an inhibitory effect toward bacillus subtilis if the undissociated form was more than0.683% and0.256%, respetively.

当乳酸和醋酸其未解离部分的浓度分别大于0.683%0.256%对枯草芽胞杆菌有抑菌作用。

3.All the sebacic acids were exist as the dianion, and there was no undissociated molecules.

该过程中所有的癸二酸是以离子的形式存在的，不存在未解离的癸二酸分子。

4.In a chemical solution, the acid is often present as an undissociated 未解离的 molecule, affecting its reactivity.

在化学溶液中，酸通常以未解离的 undissociated 分子的形式存在，这影响了它的反应性。

5.The undissociated 未解离的 form of the drug can be more effective in certain biological environments.

药物的未解离的 undissociated 形式在某些生物环境中可能更有效。

6.During the experiment, we observed that the undissociated 未解离的 ions remained stable under specific conditions.

在实验过程中，我们观察到未解离的 undissociated 离子在特定条件下保持稳定。

7.When analyzing the pH levels, it's important to consider the amount of undissociated 未解离的 acid present.

在分析pH水平时，考虑存在的未解离的 undissociated 酸的量是很重要的。

8.The equilibrium between undissociated 未解离的 and dissociated forms can influence the solubility of the compound.

未解离的 undissociated 形式与解离形式之间的平衡可以影响化合物的溶解度。

作文

In the realm of chemistry, understanding the behavior of various substances is crucial for both theoretical and practical applications. One term that often arises in discussions about chemical reactions and solutions is undissociated. This term refers to molecules or ions that remain intact and have not been separated into their constituent parts. For instance, when we consider a strong acid like hydrochloric acid (HCl), it dissociates completely in water to form hydrogen ions (H⁺) and chloride ions (Cl⁻). However, in a weak acid like acetic acid (CH₃COOH), a significant proportion of the acid remains in its undissociated form, meaning that not all of the molecules break apart into ions. The concept of undissociated species is essential when discussing equilibrium in chemical reactions. In a reversible reaction, the concentrations of both the dissociated and undissociated forms of a substance can influence the position of equilibrium. For example, if we take the dissociation of acetic acid in water: CH₃COOH ⇌ H⁺ + CH₃COO⁻, the presence of undissociated acetic acid affects the concentration of hydrogen ions in the solution. This dynamic interplay is fundamental to understanding buffer solutions, which are critical in biological systems where pH levels must be tightly regulated. Moreover, the idea of undissociated compounds extends beyond just acids and bases. In the context of ionic compounds, certain salts may also exist in an undissociated state when they are dissolved in a solvent. For example, when sodium chloride (NaCl) is dissolved in water, it dissociates into Na⁺ and Cl⁻ ions. However, if we consider a saturated solution of a sparingly soluble salt, such as barium sulfate (BaSO₄), a significant amount of the compound remains undissociated due to its low solubility. This characteristic can have implications in fields such as environmental science, where the mobility of pollutants in water can be affected by the presence of undissociated compounds. Understanding the role of undissociated species is not only vital in chemistry but also in pharmacology. Many drugs exist in an undissociated form when administered, and their ability to cross cell membranes often depends on their state of dissociation. For instance, weakly acidic or basic drugs may be more effectively absorbed in certain pH environments, emphasizing the importance of the undissociated form in drug design and efficacy. In summary, the term undissociated holds significant importance across various scientific disciplines. Whether in chemistry, environmental science, or pharmacology, recognizing the implications of undissociated species enhances our understanding of chemical behavior and interactions. It allows scientists and researchers to predict how substances will behave under different conditions, ultimately leading to advancements in technology, medicine, and environmental management. As we continue to explore the complexities of chemical interactions, the concept of undissociated species will undoubtedly remain a key focus in our quest for knowledge.

在化学领域，理解各种物质的行为对理论和实际应用至关重要。一个在讨论化学反应和溶液时经常出现的术语是undissociated。这个术语指的是保持完整且未分离成其组成部分的分子或离子。例如，当我们考虑强酸如盐酸（HCl）时，它在水中完全解离形成氢离子（H⁺）和氯离子（Cl⁻）。然而，在弱酸如醋酸（CH₃COOH）中，相当一部分酸仍然保持在其undissociated形式，这意味着并不是所有的分子都分解成离子。 undissociated物种的概念在讨论化学反应的平衡时至关重要。在可逆反应中，物质的解离和undissociated形式的浓度都会影响平衡的位置。例如，如果我们考虑醋酸在水中的解离反应：CH₃COOH ⇌ H⁺ + CH₃COO⁻，则未解离的醋酸的存在会影响溶液中氢离子的浓度。这种动态的相互作用对于理解缓冲溶液至关重要，缓冲溶液在生物系统中是关键的，因为pH水平必须严格调节。 此外，undissociated化合物的概念不仅限于酸和碱。在离子化合物的背景下，某些盐在溶剂中溶解时也可能以undissociated状态存在。例如，当氯化钠（NaCl）溶解在水中时，它解离为Na⁺和Cl⁻离子。然而，如果我们考虑一种难溶盐如硫酸钡（BaSO₄）的饱和溶液，由于其低溶解度，显著量的化合物仍然保持undissociated状态。这一特性在环境科学等领域可能具有重要意义，因为污染物在水中的迁移能力可能受到undissociated化合物存在的影响。 理解undissociated物种的作用不仅在化学中至关重要，在药理学中也是如此。许多药物在给药时以undissociated形式存在，它们跨越细胞膜的能力往往取决于它们的解离状态。例如，弱酸或弱碱药物在某些pH环境中可能更有效地被吸收，这强调了undissociated形式在药物设计和疗效中的重要性。 总之，术语undissociated在各个科学学科中具有重要意义。无论是在化学、环境科学还是药理学，认识到undissociated物种的影响增强了我们对化学行为和相互作用的理解。它使科学家和研究人员能够预测物质在不同条件下的行为，最终推动技术、医学和环境管理的进步。随着我们继续探索化学相互作用的复杂性，undissociated物种的概念无疑将成为我们知识追求中的一个关键焦点。