stoichiometric ratio

简明释义

化学计量比

英英释义

例句

1.In a chemical reaction, if the stoichiometric ratio 化学计量比 is not followed, the products may be incomplete.

在化学反应中，如果不遵循化学计量比，产品可能会不完全。

2.The laboratory experiment required us to calculate the stoichiometric ratio 化学计量比 of reactants to maximize yield.

实验室实验要求我们计算反应物的化学计量比以最大化产量。

3.During the synthesis of water, the stoichiometric ratio 化学计量比 of hydrogen to oxygen must be 2:1.

在水的合成过程中，氢与氧的化学计量比必须为2:1。

4.Understanding the stoichiometric ratio 化学计量比 is crucial for scaling up reactions in industrial processes.

理解化学计量比对工业过程中的反应放大至关重要。

5.To achieve complete combustion of the fuel, it is essential to maintain the correct stoichiometric ratio 化学计量比 of fuel to oxygen.

为了实现燃料的完全燃烧，保持燃料与氧气之间的正确化学计量比是至关重要的。

作文

In the realm of chemistry, understanding the concept of the stoichiometric ratio is essential for anyone who wishes to delve into the intricacies of chemical reactions and their calculations. The stoichiometric ratio refers to the proportional relationship between the quantities of reactants and products in a balanced chemical equation. This ratio is crucial because it allows chemists to predict the amounts of substances consumed and produced during a reaction, ensuring that reactions occur efficiently and effectively.To illustrate the importance of the stoichiometric ratio, consider the combustion of methane, which can be represented by the balanced chemical equation: CH₄ + 2O₂ → CO₂ + 2H₂O. In this reaction, one mole of methane reacts with two moles of oxygen to produce one mole of carbon dioxide and two moles of water. The stoichiometric ratio here is 1:2:1:2, indicating that for every one mole of methane, two moles of oxygen are required, resulting in one mole of carbon dioxide and two moles of water. By using this ratio, chemists can calculate how much oxygen is needed to completely combust a given amount of methane, or conversely, how much methane would be produced from a specific quantity of oxygen.Moreover, the stoichiometric ratio plays a vital role in industrial applications, particularly in the production of chemicals, pharmaceuticals, and fuels. For instance, in the production of ammonia via the Haber process, nitrogen and hydrogen gases react in a specific stoichiometric ratio of 1:3 to produce ammonia. Understanding this ratio is crucial for optimizing the reaction conditions and maximizing yield. If the reactants are not mixed in the correct stoichiometric ratio, it can lead to excess unreacted material, wasted resources, and increased costs.In addition to practical applications, the stoichiometric ratio also serves as a fundamental concept in theoretical chemistry. It allows scientists to derive relationships between different chemical species and to understand the conservation of mass in chemical reactions. The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction; thus, the total mass of reactants must equal the total mass of products. The stoichiometric ratio embodies this principle, providing a mathematical framework to quantify the interactions between substances.Furthermore, grasping the stoichiometric ratio enhances students' problem-solving skills in chemistry. Many chemistry problems involve calculating the amounts of reactants needed or the products formed based on given quantities. By mastering the stoichiometric ratio, students can approach these problems systematically, breaking them down into manageable steps and applying the appropriate conversion factors.In conclusion, the stoichiometric ratio is a cornerstone of chemical understanding, bridging the gap between theoretical concepts and practical applications. Whether in academic settings or industrial processes, recognizing and utilizing the stoichiometric ratio is imperative for successful chemical analysis and synthesis. As students and professionals alike continue to explore the vast world of chemistry, the stoichiometric ratio will undoubtedly remain a key element in their toolkit, enabling them to navigate the complexities of chemical reactions with confidence and precision.

在化学领域，理解化学计量比的概念对于任何希望深入了解化学反应及其计算的人来说都是至关重要的。化学计量比是指在平衡化学方程中反应物和产物之间的数量关系。这一比率至关重要，因为它使化学家能够预测反应过程中消耗和产生的物质量，从而确保反应高效且有效。为了说明化学计量比的重要性，考虑甲烷的燃烧，可以用平衡化学方程表示：CH₄ + 2O₂ → CO₂ + 2H₂O。在这个反应中，一摩尔甲烷与两摩尔氧气反应，生成一摩尔二氧化碳和两摩尔水。这里的化学计量比是1:2:1:2，表明每一摩尔甲烷需要两摩尔氧气，生成一摩尔二氧化碳和两摩尔水。通过使用这个比率，化学家可以计算出完全燃烧给定量的甲烷所需的氧气量，或者反之，计算特定量的氧气会产生多少甲烷。此外，化学计量比在工业应用中也发挥着至关重要的作用，特别是在化学品、制药和燃料的生产中。例如，在哈伯法合成氨的过程中，氮气和氢气以特定的化学计量比（1:3）反应生成氨。理解这一比率对优化反应条件和最大化产率至关重要。如果反应物没有以正确的化学计量比混合，可能会导致多余的未反应材料、资源浪费和成本增加。除了实际应用外，化学计量比也是理论化学中的一个基本概念。它使科学家能够推导不同化学物质之间的关系，并理解化学反应中的质量守恒。质量守恒定律指出，物质在化学反应中不能被创造或销毁；因此，反应物的总质量必须等于产物的总质量。化学计量比体现了这一原则，提供了一个数学框架来量化物质之间的相互作用。此外，掌握化学计量比增强了学生在化学方面的解决问题能力。许多化学问题涉及根据给定数量计算所需的反应物或形成的产物。通过掌握化学计量比，学生可以系统地处理这些问题，将其分解为可管理的步骤并应用适当的转换因子。总之，化学计量比是化学理解的基石，连接了理论概念与实际应用。无论是在学术环境还是工业过程中，认识和利用化学计量比对于成功的化学分析和合成都是至关重要的。随着学生和专业人士继续探索广阔的化学世界，化学计量比无疑将继续成为他们工具箱中的关键元素，使他们能够自信而精准地驾驭化学反应的复杂性。