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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).
27 Σεπ 2022 · Colloids are classified as foams, aerosols, emulsions, gels, or sols, depending on the nature of the dispersed phase and dispersion medium. Familiar examples of colloids include mayonnaise, milk, fog, smoke, and gelatin. A gel is a colloid of solid particles in a liquid medium.
The document summarizes an experiment aimed at determining the differences between types of colloids and their properties. It also compares two methods for preparing colloidal systems: dispersion and condensation.
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.
13 Νοε 2022 · Learning Objectives. Summarize the principal distinguishing properties of solutions, colloidal dispersions, and suspensions. For the various dispersion types (emulsion, gel, sol, foam, etc.), name the type (gas, liquid, or solid) of both the dispersed phase and the dispersions phase.
Abstract: Colloid science is the science of both large molecules and finely subdivided multiphase systems. It is the system of more than one phase that colloid and surface science meet.
The document is a laboratory activity report from Saint Mary's University about the properties of colloids. It describes three experiments: [1] adding acid to milk and observing curd formation, [2] using dialysis bags to observe particle size, and [3] using gelatin as an emulsifying agent to prevent precipitation in a silver nitrate solution.
