5 Questions
How are soil colloids observed?
Using an electron microscope
What is the size of soil colloids?
Less than 0.001 mm
What is the total surface area of soil colloids?
Ranges from 10 m2/g to more than 800 m2/g
What gives rise to an ionic double layer in soil colloids?
Negative charge of soil colloids attracting positive ions
What do soil colloids attract on their surfaces?
Cations like H+, Al3+, Ca2+ and Mg2+
Study Notes
Observing Soil Colloids
- Soil colloids are observed using techniques such as electron microscopy, centrifugation, and chromatography.
Characteristics of Soil Colloids
- The size of soil colloids ranges from 1-1000 nanometers (nm) in diameter.
Surface Area of Soil Colloids
- The total surface area of soil colloids is very large due to their small size.
Ionic Double Layer in Soil Colloids
- The ionic double layer in soil colloids is formed when the colloid surface reacts with ions in the surrounding solution, creating a layer of opposite charge.
Attraction on Soil Colloid Surfaces
- Soil colloids attract and hold ions, water, and organic compounds on their surfaces through electrostatic forces, hydrogen bonding, and van der Waals interactions.
Learn about the general properties of soil colloids, including their small size and colloidal nature. Understand the characteristics of clay fraction and the specific size range of particles with colloidal properties.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
