empirical formula

简明释义

经验式

英英释义

例句

1.In organic chemistry, the empirical formula 经验式 can be derived from combustion analysis.

在有机化学中，经验式可以通过燃烧分析得出。

2.We calculated the empirical formula 经验式 of glucose as C1H2O1.

我们计算出葡萄糖的经验式为C1H2O1。

3.The empirical formula 经验式 provides the simplest ratio of elements in a compound.

经验式提供了化合物中元素的最简单比例。

4.To simplify the molecular structure, we often use the empirical formula 经验式 in our reports.

为了简化分子结构，我们在报告中常常使用经验式。

5.The chemist determined the empirical formula 经验式 of the compound through a series of experiments.

化学家通过一系列实验确定了该化合物的经验式。

作文

In the realm of chemistry, understanding the composition of substances is crucial. One of the fundamental concepts that students and professionals alike must grasp is the idea of an empirical formula. The empirical formula of a compound provides the simplest whole-number ratio of the elements present in that compound. It does not give information about the actual number of atoms in a molecule, nor does it reveal the arrangement of those atoms; rather, it serves as a basic representation of the elemental makeup of the substance.For example, consider the compound glucose, which has the molecular formula C6H12O6. The empirical formula for glucose is CH2O, indicating that for every carbon atom, there are two hydrogen atoms and one oxygen atom. This simplification is incredibly useful in various applications, particularly in stoichiometry, where chemists need to balance chemical equations and calculate the amounts of reactants and products involved in a reaction.Understanding the empirical formula also aids in identifying unknown substances. When scientists analyze a sample and determine the masses of the constituent elements, they can calculate the empirical formula by finding the simplest ratio of these elements. This process often involves converting the mass of each element to moles and then dividing by the smallest number of moles present to achieve the simplest ratio.Moreover, the empirical formula is not only limited to organic compounds like carbohydrates but also extends to inorganic compounds. For instance, sodium chloride (NaCl) has an empirical formula that is identical to its molecular formula, as it exists in a 1:1 ratio of sodium to chlorine atoms. In contrast, substances like hydrogen peroxide (H2O2) have an empirical formula of HO, highlighting the importance of recognizing that the empirical formula can differ from the molecular formula.In practical applications, the empirical formula plays a vital role in industries such as pharmaceuticals, materials science, and environmental science. In drug development, for instance, knowing the empirical formula can help chemists design compounds with desired properties and biological activity. Similarly, in materials science, understanding the empirical formula of a new material can provide insights into its stability, reactivity, and potential uses.In conclusion, the empirical formula is a foundational concept in chemistry that encapsulates the essence of a compound's composition in the simplest terms. By providing a straightforward way to represent the ratios of elements, it facilitates various scientific endeavors, from research and analysis to practical applications in industry. As students and professionals continue to explore the complexities of chemical compounds, a solid grasp of the empirical formula will undoubtedly enhance their understanding and capabilities in the field of chemistry.

在化学领域，理解物质的组成至关重要。学生和专业人士都必须掌握的基本概念之一是经验式的概念。化合物的经验式提供了该化合物中元素的最简单整数比。它不提供分子中实际原子的数量信息，也不揭示这些原子的排列；相反，它作为物质元素组成的基本表示。例如，考虑化合物葡萄糖，其分子式为C6H12O6。葡萄糖的经验式为CH2O，表明每个碳原子对应两个氢原子和一个氧原子。这种简化在各种应用中非常有用，特别是在化学计量学中，化学家需要平衡化学方程式并计算反应中涉及的反应物和产品的数量。理解经验式还有助于识别未知物质。当科学家分析样品并确定组成元素的质量时，他们可以通过找到这些元素的最简单比例来计算经验式。这个过程通常涉及将每种元素的质量转换为摩尔，然后通过存在的最小摩尔数进行除法，以实现最简单的比例。此外，经验式不仅限于像碳水化合物这样的有机化合物，还扩展到无机化合物。例如，氯化钠(NaCl)的经验式与其分子式相同，因为它以1:1的比例存在于钠和氯原子之间。相比之下，像过氧化氢(H2O2)这样的物质其经验式为HO，这突显了认识到经验式可能与分子式不同的重要性。在实际应用中，经验式在制药、材料科学和环境科学等行业中发挥着重要作用。例如，在药物开发中，了解经验式可以帮助化学家设计具有所需特性和生物活性的化合物。同样，在材料科学中，理解新材料的经验式可以提供有关其稳定性、反应性和潜在用途的见解。总之，经验式是化学中的一个基础概念，以最简单的术语概括了化合物的组成。通过提供一种直接表示元素比例的方式，它促进了各种科学工作，从研究和分析到工业中的实际应用。随着学生和专业人士继续探索化学化合物的复杂性，扎实掌握经验式无疑将增强他们在化学领域的理解和能力。