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Solutions are homogeneous mixtures of two or more substances in which the components are present as individual atoms, molecules or ions. The individual components are uniformly distributed and are fare too small to be seen by eye. Liquid and gas solutions do not scatter much light and therefore are transparent (clear).
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.
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).
Colloids – mixtures with particle sizes that are intermediate in size and do not settle out upon standing. Ex: glue, Jello, paint, smoke, milk. Tyndall effect- the scattering of light in all directions. Suspensions and colloids exhibit this effect but solutions do not due to the fact th.
26 Αυγ 2023 · In this chapter, we will consider the nature of solutions, and examine factors that determine whether a solution will form and what properties it may have. In addition, we will discuss colloids—systems that resemble solutions but consist of dispersions of particles somewhat larger than ordinary molecules or ions.
2.1 Introduction – Why and which forces are of importance in colloid and surface chemistry? 11 2.2 Two important long-range forces between molecules 12 2.3 The van der Waals forces 15
