复合计和氧化还原滴定之间的差异

Thekey difference between complexometric and redox titrationsis that complexometric titrations involve the formation of a complex ion from a simple ion and a colour change in the sample solution at theequivalence point, whereas redox titrations involve thereduction or oxidationof the sample solution at the equivalence point.

复合体和氧化还原滴定之间存在几个差异。滴定方法，endpointdetection and applications are some of the criteria where they become different from each other.

CONTENTS

1.Overview and Key Difference
2.What is a Complexometric Titration
3.什么是氧化还原滴定
4.Complexometric vs Redox Titration in Tabular Form
5.Summary – Complexometric vs Redox Titration

什么是复杂的滴定？

复合体滴定是一种滴定技术，其中有色复合物的形成有助于确定滴定的端点。这是一种体积分析。这种类型的滴定对于确定溶液中不同金属离子的混合物尤为重要，因为金属离子倾向于形成复合物。

We need to use an indicator that is capable of producing a visible colour change in the solution. The complexometric reactions that take place in these titrations include the conversion of a simple ion into a complex ion, and a metal indicator or electrometrical methods can also be used as indicators. The most common types of complexometric titrations are EDTA titrations, which involve the chelation of metal ions using EDTA.

在考虑使用复合体滴定的用途时，它对于确定药物的金属浓度，确定化妆品产品中的二氧化钛含量等。

什么是氧化还原滴定?

Redox titrations are a type of titration technique that involves a reducing agent and an oxidizing agent. These titrations typically involve a redox indicator or a potentiometer. Moreover, there are different types of redox titrations that are named according to the titrant used in the titration. Examples include bromometry (which use bromine as the titrant), cerimetry (uses cerium(IV) salts as the titrant), dichrometry (uses potassium dichromate as the titrant), iodometry (uses iodine as the titrant), and permanganometry (uses potassium permanganate as the titrant).

For the evaluation of redox titration, we need to understand the shape of the titration curve of redox titration. For example, in acid-base titrations and complexometric titrations, the titration curve shows the change of hydronium ion concentration in the form of pH change or the change of a particular ion upon the addition of the titrant. But in redox titrations, we need to monitor the potential of the titration reaction rather than the concentration of the ionic species.

Using a reasonably approximated titration curve, we can identify the relationship between the equivalence point and the endpoint of redox titration. However, we can get the equivalence point if we react to the stoichiometrically equivalent amounts of titrant and titrand. But a variety of methods exist for the determination of the endpoint, e.g. use of indicators or sensors that respond to the change of the conditions of the sample solution. The most accurate method of finding the endpoint of the redox titration is the potentiometric titration, where we can monitor the change in potential upon the addition of titrant to the titrand. There, we can visually examine the endpoint of the titration curve.

什么是不同ence Between Complexometric and Redox Titration?

复合体和氧化还原滴定之间的关键区别在于，复合体滴定涉及从简单离子形成复合离子和等效点样品溶液中的颜色变化，而氧化还原滴定涉及在样品溶液中的还原或氧化样品溶液的氧化或氧化。等效点。基于标准，例如滴定方法，端点检测和应用程序，复合体和氧化还原滴定之间还有其他几个差异。

The following table presents the difference between complexometric and redox titrations in tabular form for side by side comparison.

Summary – Complexometric vs Redox Titration

复合体和氧化还原滴定之间的关键区别在于，复合体滴定涉及从简单离子形成复合离子和等效点样品溶液中的颜色变化，而氧化还原滴定涉及在样品溶液中的还原或氧化样品溶液的氧化或氧化。等效点。

Reference:

1. Helmenstine, Anne Marie. “Redox Titration Definition (Chemistry)。”thowscoco。

Image Courtesy:

1. “Complexometric titration由Alina.Popova”。26日,自己的工作(CC BY 4.0)via Commons Wikimedia