equivalent mass

简明释义

等效质量;

英英释义

例句

1.When titrating a solution, knowing the equivalent mass 当量质量 of the titrant is essential for accurate results.

在滴定溶液时，了解滴定剂的equivalent mass 当量质量 对于获得准确结果至关重要。

2.In chemical reactions, the concept of equivalent mass 当量质量 helps in determining how much of a reactant is needed.

在化学反应中，equivalent mass 当量质量 的概念有助于确定需要多少反应物。

3.To calculate the equivalent mass 当量质量 of an acid, you divide its molar mass by the number of hydrogen ions it can donate.

要计算酸的equivalent mass 当量质量，你需要将其摩尔质量除以它能释放的氢离子数量。

4.The equivalent mass 当量质量 of a base is determined similarly to that of an acid.

碱的equivalent mass 当量质量 的确定方法与酸类似。

5.The equivalent mass 当量质量 of a compound is crucial for stoichiometric calculations in chemistry.

化合物的equivalent mass 当量质量 对于化学中的化学计量计算至关重要。

作文

In the field of chemistry, understanding the concept of equivalent mass is crucial for various applications, particularly in stoichiometry and solution preparation. The term equivalent mass refers to the mass of a substance that will combine with or displace one mole of hydrogen atoms or the equivalent amount of another element in a chemical reaction. This concept is essential for chemists as it allows them to calculate how much of a reactant is needed to completely react with another substance. To grasp the significance of equivalent mass, let’s consider an example involving an acid-base reaction. Suppose we have hydrochloric acid (HCl) reacting with sodium hydroxide (NaOH). In this reaction, one mole of HCl reacts with one mole of NaOH to produce water and sodium chloride. Here, the equivalent mass of HCl is equal to its molar mass because it donates one proton (H+) in the reaction. Therefore, if we know the molar mass of HCl is approximately 36.5 grams per mole, we can conclude that its equivalent mass is also 36.5 grams.This concept becomes even more interesting when dealing with polyprotic acids, which can donate more than one proton. For instance, sulfuric acid (H2SO4) can donate two protons. Thus, its equivalent mass is half of its molar mass. If the molar mass of sulfuric acid is about 98 grams per mole, then its equivalent mass would be 49 grams. This distinction is vital for accurately calculating the amounts needed in reactions involving such acids.Moreover, the application of equivalent mass extends beyond just acids and bases. In redox reactions, where oxidation and reduction occur, the equivalent mass helps in determining how much of an oxidizing or reducing agent is required to achieve a desired outcome. For example, in the case of potassium permanganate (KMnO4) used in titrations, its equivalent mass can vary depending on the reaction conditions and the species it is reacting with. This variability emphasizes the importance of understanding the specific context in which equivalent mass is applied.In practical laboratory settings, knowing how to calculate equivalent mass can save time and resources. It allows chemists to prepare solutions with precise concentrations, ensuring that reactions proceed as expected. Furthermore, in industrial processes such as pharmaceuticals, the accurate determination of equivalent mass can lead to more efficient production methods and better quality control.In conclusion, the concept of equivalent mass is not just a theoretical idea but a practical tool that plays a significant role in the field of chemistry. By understanding this concept, chemists can make informed decisions about reactant quantities, optimize reactions, and enhance the overall efficiency of chemical processes. As we continue to explore the complexities of chemical reactions, the importance of mastering the idea of equivalent mass cannot be overstated.

在化学领域，理解“当量质量”的概念对于各种应用至关重要，尤其是在化学计量学和溶液制备中。“当量质量”一词指的是一种物质的质量，该质量能够与一个摩尔的氢原子结合或置换在化学反应中另一种元素的等量。这一概念对化学家来说非常重要，因为它使他们能够计算出需要多少反应物才能与另一种物质完全反应。为了更好地理解“当量质量”的重要性，让我们考虑一个涉及酸碱反应的例子。假设我们有盐酸（HCl）与氢氧化钠（NaOH）反应。在这个反应中，一个摩尔的HCl与一个摩尔的NaOH反应，生成水和氯化钠。在这里，HCl的“当量质量”等于其摩尔质量，因为它在反应中捐赠一个质子（H+）。因此，如果我们知道HCl的摩尔质量约为36.5克每摩尔，我们可以得出结论，它的“当量质量”也是36.5克。当处理多质子酸时，这个概念变得更加有趣，因为它们可以捐赠多个质子。例如，硫酸（H2SO4）可以捐赠两个质子。因此，它的“当量质量”是其摩尔质量的一半。如果硫酸的摩尔质量约为98克每摩尔，那么它的“当量质量”将是49克。这一区别对于准确计算涉及此类酸的反应所需的量至关重要。此外，“当量质量”的应用超越了酸和碱。在发生氧化还原反应时，氧化剂和还原剂的“当量质量”有助于确定达到期望结果所需的氧化剂或还原剂的量。例如，在滴定中使用的高锰酸钾（KMnO4），其“当量质量”可能会根据反应条件和它所反应的物质而有所不同。这种变化强调了理解“当量质量”应用特定背景的重要性。在实际实验室环境中，知道如何计算“当量质量”可以节省时间和资源。它使化学家能够制备具有精确浓度的溶液，从而确保反应按预期进行。此外，在制药等工业过程中，准确确定“当量质量”可以导致更高效的生产方法和更好的质量控制。总之，“当量质量”的概念不仅仅是一个理论概念，而是一个在化学领域中扮演重要角色的实用工具。通过理解这一概念，化学家可以就反应物数量做出明智的决策，优化反应，增强化学过程的整体效率。随着我们继续探索化学反应的复杂性，掌握“当量质量”这一理念的重要性不容小觑。