Difference Between Catalyst and Reagent

Thekey differencebetween catalyst and reagent is thatcatalysts are not consumed during the chemical reaction, whereas reagents may or may be consumed during achemical reaction.

催化剂和摄政是我们经常在分析化学中使用的两个重要术语来描述化学反应。有些人也可以互换使用这两个术语和反应剂，即使它们之间有微小的差异。催化剂是可以增加的物质reaction rate特定的化学反应，而试剂是用于化学分析或其他反应的物质或混合物。

内容

1.Overview and Key Difference
2.什么是催化剂
3.What is a Reagent
4.并排比较 - 表格形式的催化剂与试剂
5.概括

什么是催化剂?

催化剂是可以增加的物质reaction rate of a particular chemical reaction. The process of increasing the reaction rate is “catalysis”. The most specific property of a catalyst is that the chemical reaction does not consume the catalysts during the progression of the reaction. However, this substance directly participates in the reaction. Therefore, this substance recycles, and we can separate it from the reaction mixture in order to use it in another reaction. Moreover, we need only a small amount of the catalyst for the catalysis of a chemical reaction.

Generally, chemical reactions occur faster when there is a catalyst. It is because this substance can provide an alternative pathway for the reaction to occur. The alternative pathway always has a low activation energy than the usual pathway (which occurs in the absence of catalyst). Moreover, catalyst tends to form an intermediate with the reactant, and it regenerates later. In contrast, if a substance decreases the reaction rate, we call it an inhibitor.

我们可以将催化剂分类为homogeneous or heterogeneous catalysts. If it is homogeneous, it means that the catalyst and reactants are in the same phase of matter (i.e. liquid phase). On the other hand, if the catalyst is in a different phase from that of the reactants, then it is a heterogeneous catalyst. Here, gaseous reactants adsorbed on to a solid catalyst surface.

What is a Reagent?

试剂是一种物质或混合物用于切mical analysis or other reactions. It can be either a catalyst, which increases the reaction rate or a reactant which is consumed during the reaction.

If not, it may not involve in a chemical reaction in any way. For example, solvents such as water can be only the medium for a chemical reaction but not a reactant consumed during a chemical reaction or a catalyst that increases the reaction rate. In addition, reagents are eithercompounds or mixtures.

What is the Difference Between Catalyst and Reagent?

催化剂是可以增加的物质reaction rate of a particular chemical reaction, while reagent is a substance or mixture for use in chemical analysis or other reactions. The key difference between catalyst and reagent is that catalysts are not consumed during the chemical reaction, whereas reagent may or may be consumed during a chemical reaction.

此外，催化剂和试剂之间的进一步差异是化学反应完成后催化剂再生，而试剂可能会再生也可能不会再生。催化剂的一些示例包括铁是氨合成的催化剂，沸石是石油架等的催化剂。另一方面，试剂的示例包括Grignard试剂，Tollen试剂，Fehling的试剂等。

摘要 - 催化剂与试剂

A catalyst is a substance that can increase the reaction rate of a particular chemical reaction, while a reagent is a substance or mixture for use in chemical analysis or other reactions. The key difference between catalyst and reagent is that catalysts are not consumed during the chemical reaction, whereas reagent may or may be consumed during a chemical reaction.

Reference:

1. Helmenstine，Anne Marie。“试剂的定义和示例。”thowsco，梅。8，2019，Available here.

Image Courtesy:

1. “CatalysisScheme” By Smokefoot assumed. Own work assumed (based on copyright claims) (Public Domain) viaCommons Wikimedia
2. “sulfer1” By Mrs Pugliano(CC BY-SA 2.0)viaFlickr