ÓXIDOS 🧪 Formulación Inorgánica

Learn to Formulate Oxides

Introduction to Inorganic Formulation

• The video introduces the topic of formulating oxides, focusing on three types: metallic, non-metallic, and oxygen compounds.

• It emphasizes that the nomenclature for metallic and non-metallic oxides is similar, with the only difference being whether the element is a metal or a non-metal.

Understanding Valency and Oxidation States

• Oxygen in these compounds typically has a valency of 2 or an oxidation number of 2; it's important to note that valency and oxidation number are equivalent.

Systematic Nomenclature

• The systematic nomenclature includes naming conventions for various oxides such as lead oxide, silver oxide, sulfur oxide, and chlorine oxide.

• Prefixes are used in systematic nomenclature; examples include "mono-" for one atom and "di-" for two atoms.

Applying Prefixes in Naming

• When naming compounds like lead oxide, prefixes indicate the number of atoms present. For example:

• Lead (Pb) with oxygen (O): Dioxide if there are two oxygens.

• Silver (Ag): Monoxide if there's one oxygen but no prefix needed since it has only one valency.

Stock Nomenclature Method

• The stock method involves writing the name of the metal followed by its oxidation state in parentheses. This requires knowledge of each element's valency from periodic tables or memorization.

• An example given is potassium oxide where potassium has a valency of 1 and oxygen has a valency of 2.

Simplification in Nomenclature

• If both elements have common factors in their valencies, they can be simplified. For instance:

• Sulfur dioxide may appear as just sulfur without indicating its original value due to simplification rules.

Practice Exercise on Metallic and Non-Metallic Compounds

• A practice exercise is introduced involving determining the stock name for selenium dioxide based on its components' properties.

Understanding Oxides and Valences in Chemistry

The Role of Selenium in Oxides

• Discussion begins with the oxide of selenium, emphasizing the importance of valence. It is noted that selenium must have a valence of 2 due to its interaction with oxygen.

• The compound being analyzed is nitrogen oxide, where nitrogen exhibits a valence of 3. The systematic naming involves placing the valences correctly beneath their respective elements.

Lithium Oxide and Its Nomenclature

• Introduction to lithium oxide, highlighting that lithium has only one valence. Therefore, it is simply named "lithium oxide" without prefixes or Roman numerals.

• Challenges arise when dealing with compounds containing elements with a single valence. It's crucial to remember the specific valence for accurate nomenclature.

Understanding Group 17 Elements

• Explanation on how to write compounds involving elements from group 17 (halogens). The order of writing starts with oxygen followed by the halogen element.

• Specific mention of fluorine as an example; it is referred to as "fluoride." When there are two atoms, a prefix is added for clarity in naming.

Halides and Their Naming Conventions