How to Find Oxidation Number

Описание: Oxidation numbers are a core topic in general chemistry and play a major role in understanding Redox processes. In this video, I explain how to find oxidation number and how to calculate oxidation state using clear rules and simple logic. You’ll learn how to get the oxidation number, how to assign oxidation numbers, and how to determine oxidation number correctly in a wide range of examples.

The lesson is grouped into two main categories.
First, we look at substances given on their own — either as elements or simple ions — and identify their oxidation state quickly using basic rules. This includes understanding the oxidation state definition and recognizing common oxidation states of elements.
Then we move on to substances with multiple atoms, including compounds and polyatomic ions. For this category, I provide step-by-step rules for assigning oxidation states, using a priority system to decide which atoms get assigned first.

You’ll also learn important tricks to find oxidation number, including key exceptions for hydrogen and oxygen, which are essential for mastering oxidation and reduction and redox reactions. To finish, we work through several practice problems where you’ll see that oxidation numbers can be zero or even fractional, helping you understand real-world cases in oxidation numbers chemistry.

This tutorial is ideal for students learning how to calculate oxidation numbers, how to find the oxidation state of an element, and how to find oxidation state class 11, as well as anyone preparing for exams involving oxidation states and redox concepts.

📒 Chapters 📒
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0:00 Introduction
0:05 What oxidation number (oxidation state) means and why we use it
0:46 How the rules for oxidation numbers are organized
1:08 Finding oxidation numbers for elements and simple ions
2:19 Oxidation numbers in compounds and polyatomic ions using priority rules
5:10 Special case: oxidation state of hydrogen
5:55 Special case: oxidation number of oxygen
8:36 Practice problems and fractional oxidation numbers
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