Adsorption
Adsorption is the process by which molecules of a substance adhere to the surface of a solid or liquid material. This phenomenon occurs due to the attractive forces between the adsorbate (the substance being adsorbed) and the surface of the adsorbent (the material to which the adsorbate adheres).
Types of Adsorption
There are two main types of adsorption:
- Physical Adsorption (Physisorption): This type of adsorption involves weak van der Waals forces between the adsorbate and the adsorbent. It is typically reversible and occurs at the surface of the adsorbent.
- Chemical Adsorption (Chemisorption): Chemisorption involves the formation of chemical bonds between the adsorbate and the adsorbent. This type of adsorption is more specific and stronger than physical adsorption.
Factors Affecting Adsorption
Several factors can influence the process of adsorption:
- Surface Area: A larger surface area of the adsorbent allows for more adsorption sites and increases the potential for adsorption.
- Temperature: Generally, adsorption increases with a decrease in temperature.
- Pressure: Higher pressure can enhance adsorption, particularly for gases.
- Nature of Adsorbate and Adsorbent: The chemical and physical properties of the adsorbate and adsorbent play a significant role in adsorption.
Applications of Adsorption
Adsorption has various practical applications, including:
- Water purification
- Gas masks for protection against toxic gases
- Chromatography in chemistry
- Catalysis in chemical reactions
Study Guide for Adsorption
When studying adsorption, it is important to understand the following key points:
.◂Science Worksheets and Study Guides Seventh Grade. Elements and the periodic table
Study Guide
Elements and the periodic table 
Activity Lesson
Elements & the Periodic Table Worksheet/Answer key
Elements and the periodic table Worksheet/Answer key
Elements and the periodic table Worksheet/Answer key
Elements and the periodic table Worksheet/Answer key
Elements and the periodic table Vocabulary/Answer key
Elements and the periodic table Vocabulary/Answer key
Elements and the periodic table
Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Chemistry: Students will use scientific skills and processes to explain the composition, structure, and interactions of matter in order to support the predictability of structure and energy transformations.
Structure of Matter: Cite evidence to support the fact that all matter is made up of atoms, which are far too small to see directly through a microscope.
Recognize and describe that the atoms of each element are alike but different from atoms of other elements.
Recognize and describe that different arrangements of atoms into groups compose all substances.
Provide examples to illustrate that elements are substances that do not breakdown into smaller parts during normal investigations involving heating, exposure to electric current or reactions with acids.
Cite evidence to explain that all living and non-living things can be broken down to a set of known elements.