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Colloid is a term that has come to encompass solid particles suspended in a liquid (a colloidal dispersion), microscopic droplets in a liquid (an emulsion), or either solid or liquid phases suspended in a gas (an aerosol).
Chemistry B11 Chapter 9 Solutions and Colloids. Solutions: solutions have some properties: 1. The distribution of particles in a solution is uniform. Every part of the solution has exactly the same composition and properties as every other part (a single phase-homogenous). 2. Solutions are almost always transparent (solid solutions are exceptions).
Colloid Examples. The table below lists a few examples of colloids. [1,3,6] Preparations. Colloids are created through various techniques, two prominent ones being the condensation method and the dispersion method. [2,6] Condensation Method. The condensation method initiates particle growth from smaller entities.
Colloids and Surface Chemistry. • Simplest: tiny particles dispersed in water. What is a colloid? Finely-divided dispersion of one phase in another. Size of dispersed (“solute-like”) entity >> ordinary molecules. Example: blood cell in water. Solution. homogeneous particles are molecules. Colloid. size 1–1000 nm. particles remain suspended.
The osmotic pressure of a dilute colloidal solution is described by the Van’tHoff Equation: Π: osmotic pressure c: molar concentration of solute. This equation can be used to calculate the molecular weight of a colloid in a dilute solution. For very diluted solutions the equation can be converted as: Here, is the grams of solute per liter of
Learning Objectives. By the end of this section, you will be able to: Describe the composition and properties of colloidal dispersions. List and explain several technological applications of colloids.
In addition, we will discuss colloids—systems that resemble solutions but consist of dispersions of particles somewhat larger than ordinary molecules or ions. 11.1: Prelude to Solutions and Colloids. Solutions are crucial to the processes that sustain life and to many other processes involving chemical reactions.
