law of definite proportions

简明释义

定比律

英英释义

例句

1.When studying compounds, the law of definite proportions allows chemists to predict the outcomes of reactions.

在研究化合物时，定比法则使化学家能够预测反应的结果。

2.According to the law of definite proportions, a chemical compound always contains its component elements in fixed ratio by mass.

根据定比法则，化合物始终以固定的质量比包含其组成元素。

3.The law of definite proportions explains why water is always composed of two hydrogen atoms and one oxygen atom.

定比法则解释了为什么水始终由两个氢原子和一个氧原子组成。

4.The law of definite proportions is essential in stoichiometry for calculating reactants and products in chemical reactions.

定比法则在化学反应中计算反应物和产品的化学计量中是必不可少的。

5.In a laboratory experiment, we observed that the law of definite proportions holds true for sodium chloride.

在实验室实验中，我们观察到定比法则在氯化钠中是成立的。

作文

The concept of the law of definite proportions is fundamental in the field of chemistry, providing essential insight into how compounds are formed and understood. This law states that a chemical compound always contains its component elements in fixed ratio by mass, regardless of the amount of the compound or its source. For example, water (H2O) is composed of hydrogen and oxygen in a ratio of 2:16, or simplified, 1:8. This means that no matter where you obtain water from – whether it’s from a river, a bottle, or even in the atmosphere – the ratio of hydrogen to oxygen will always remain the same.Understanding the law of definite proportions is crucial for several reasons. Firstly, it helps chemists to identify and quantify substances. When they know the fixed ratios in which elements combine, they can predict the outcomes of chemical reactions. This predictability is vital for industries that rely on chemical processes, such as pharmaceuticals, agriculture, and manufacturing. Knowing that a specific compound will always contain certain elements in a defined ratio allows scientists and engineers to create products with consistent quality and efficacy.Secondly, the law of definite proportions aids in the understanding of chemical formulas. Each formula represents a specific ratio of elements, which is derived from this law. For instance, the formula for glucose (C6H12O6) indicates that it consists of carbon, hydrogen, and oxygen in a specific ratio. This precise representation is crucial for biochemistry, as it helps researchers understand metabolic processes and energy production within living organisms.Moreover, the law of definite proportions also emphasizes the importance of chemical purity. In many applications, especially in pharmaceuticals, the presence of impurities can alter the effectiveness of a drug. By adhering to the principles of this law, manufacturers can ensure that their products contain the correct proportions of active ingredients, thus maintaining safety and efficacy.In addition, the law of definite proportions has historical significance in the development of modern chemistry. It was one of the key principles established during the early days of chemical science, alongside the law of conservation of mass and the law of multiple proportions. These laws collectively laid the groundwork for the atomic theory, which revolutionized our understanding of matter and its interactions.In conclusion, the law of definite proportions is a cornerstone of chemical science that provides a framework for understanding how elements combine to form compounds. Its implications extend beyond the laboratory, affecting various industries and scientific disciplines. By recognizing that compounds consist of elements in fixed ratios, we gain insight into the nature of matter itself, enabling advancements in technology, medicine, and environmental science. As we continue to explore the complexities of chemistry, the law of definite proportions remains an essential principle guiding our discoveries and innovations.

定比定律是化学领域的一个基本概念，为我们提供了关于化合物如何形成和理解的重要见解。该定律指出，化学化合物始终以固定的质量比例包含其组成元素，无论化合物的数量或来源。例如，水（H2O）由氢和氧以2:16的比例组成，简化后为1:8。这意味着无论你从哪里获取水——无论是从河流、瓶子还是甚至是大气中——氢与氧的比例始终保持不变。理解定比定律至关重要，原因有几个。首先，它帮助化学家识别和量化物质。当他们知道元素结合的固定比率时，他们可以预测化学反应的结果。这种可预测性对于依赖化学过程的行业至关重要，例如制药、农业和制造业。知道特定化合物总是以某些元素的定义比例存在，使科学家和工程师能够创造出质量和功效一致的产品。其次，定比定律有助于理解化学公式。每个公式代表元素的特定比例，这源于这一法则。例如，葡萄糖（C6H12O6）的公式表明它由碳、氢和氧以特定比例组成。这种精确的表示对生物化学至关重要，因为它帮助研究人员理解生物体内的代谢过程和能量产生。此外，定比定律还强调了化学纯度的重要性。在许多应用中，特别是在制药领域，杂质的存在可能会改变药物的有效性。通过遵循这一法则的原则，制造商可以确保其产品中活性成分的正确比例，从而维持安全性和有效性。最后，定比定律在现代化学发展的历史上具有重要意义。它是早期化学科学建立的关键原则之一，与质量守恒定律和多重比例定律一起。这些法则共同奠定了原子理论的基础，彻底改变了我们对物质及其相互作用的理解。总之，定比定律是化学科学的基石，为我们提供了理解元素如何结合形成化合物的框架。它的影响超越了实验室，影响着各个行业和科学学科。通过认识到化合物由固定比例的元素组成，我们获得了对物质本质的深刻见解，从而推动了技术、医学和环境科学的发展。随着我们继续探索化学的复杂性，定比定律仍然是指导我们发现和创新的基本原则。