chemical equation

简明释义

化学方程式

英英释义

例句

1.In chemistry class, we learned how to balance a chemical equation 化学方程式 properly.

在化学课上，我们学习了如何正确平衡一个化学方程式。

2.A chemical equation 化学方程式 provides a concise way to represent chemical reactions.

一个化学方程式提供了一种简明的方式来表示化学反应。

3.Understanding a chemical equation 化学方程式 helps predict the products of a reaction.

理解一个化学方程式有助于预测反应的产物。

4.The chemical equation 化学方程式 for the reaction between hydrogen and oxygen is 2H2 + O2 → 2H2O.

氢和氧反应的化学方程式是2H2 + O2 → 2H2O。

5.We need to write a balanced chemical equation 化学方程式 for the combustion of methane.

我们需要为甲烷的燃烧写一个平衡的化学方程式。

作文

In the world of chemistry, understanding the fundamental principles that govern chemical reactions is essential. One of the most important tools for conveying these principles is the chemical equation. A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products involved. It provides a concise way to express what happens during a reaction, making it easier for scientists and students alike to understand complex processes.For instance, consider the simple reaction of hydrogen gas combining with oxygen gas to form water. The chemical equation for this reaction is 2H₂ + O₂ → 2H₂O. In this equation, the reactants are hydrogen (H₂) and oxygen (O₂), while the product is water (H₂O). The coefficients in front of the molecules indicate the number of moles involved in the reaction. This notation not only simplifies communication but also allows chemists to predict the quantities of substances consumed and produced in a reaction.Moreover, chemical equations can be balanced to reflect the law of conservation of mass, which states that matter cannot be created or destroyed in a chemical reaction. Balancing a chemical equation ensures that the number of atoms of each element is the same on both sides of the equation. For example, in the reaction mentioned earlier, there are four hydrogen atoms and two oxygen atoms on both sides, satisfying the requirement for a balanced equation.There are two main types of chemical equations: word equations and formula equations. A word equation describes the reactants and products using their names, while a formula equation uses chemical symbols and formulas. For example, the word equation for the formation of water would be 'hydrogen + oxygen → water', whereas the formula equation is 2H₂ + O₂ → 2H₂O. The latter is more precise and is commonly used in scientific literature.In addition to their role in representing reactions, chemical equations also play a crucial part in stoichiometry, which is the calculation of reactants and products in chemical reactions. By analyzing a chemical equation, chemists can determine the amount of reactants needed to produce a desired amount of product, or conversely, how much product can be formed from given quantities of reactants. This aspect is vital in industrial applications, where precise measurements are essential for efficiency and cost-effectiveness.Furthermore, chemical equations can also indicate the type of reaction taking place, such as synthesis, decomposition, single replacement, or double replacement reactions. Each type has its own characteristics and patterns, which can be identified through the format of the chemical equation. Understanding these patterns aids in predicting the behavior of substances during reactions.In conclusion, mastering the concept of chemical equations is fundamental for anyone studying chemistry. They serve as a universal language that communicates the intricacies of chemical reactions, allowing for better understanding, analysis, and application of chemical principles. As students delve deeper into the subject, they will find that being proficient in writing and interpreting chemical equations is not just an academic exercise, but a practical skill that will enhance their scientific literacy and problem-solving abilities in real-world scenarios.

在化学的世界中，理解支配化学反应的基本原理至关重要。传达这些原理的最重要工具之一是化学方程式。化学方程式是化学反应的符号表示，显示了涉及的反应物和产品。它提供了一种简明的方式来表达反应过程中发生的事情，使科学家和学生更容易理解复杂的过程。例如，考虑氢气与氧气结合形成水的简单反应。该反应的化学方程式为2H₂ + O₂ → 2H₂O。在这个方程式中，反应物是氢（H₂）和氧（O₂），而产物是水（H₂O）。分子前的系数表示反应中涉及的摩尔数。这种符号不仅简化了交流，而且还使化学家能够预测反应中消耗和生成的物质的数量。此外，化学方程式可以被平衡，以反映质量守恒定律，该定律指出，在化学反应中，物质不能被创造或销毁。平衡化学方程式确保每种元素的原子数量在方程的两边是相同的。例如，在前面提到的反应中，两边都有四个氢原子和两个氧原子，满足了平衡方程的要求。主要有两种类型的化学方程式：文字方程和公式方程。文字方程使用物质的名称描述反应物和产物，而公式方程使用化学符号和公式。例如，水的形成的文字方程是“氢 + 氧 → 水”，而公式方程是2H₂ + O₂ → 2H₂O。后者更为精确，通常用于科学文献。除了在表示反应中的作用外，化学方程式在化学反应的计量学中也发挥着关键作用，计量学是指化学反应中反应物和产品的计算。通过分析化学方程式，化学家可以确定所需的反应物量以产生所需的产物量，或者反之，从给定数量的反应物中可以形成多少产物。这一方面在工业应用中至关重要，因为精确的测量对效率和成本效益至关重要。此外，化学方程式还可以指示正在发生的反应类型，例如合成、分解、单置换或双置换反应。每种类型都有其特征和模式，可以通过化学方程式的格式进行识别。理解这些模式有助于预测物质在反应过程中的行为。总之，掌握化学方程式的概念对于任何学习化学的人来说都是基础。它们作为一种通用语言，传达化学反应的复杂性，使人们能够更好地理解、分析和应用化学原理。随着学生深入研究这一主题，他们会发现，熟练地书写和解释化学方程式不仅是一项学术练习，更是一项实用技能，将增强他们在现实场景中的科学素养和解决问题的能力。