This document discusses the development of e-content on the topic of separating mixtures. It aims to explain the concept of different types of mixtures and techniques for their separation. These techniques include distillation, chromatography, sedimentation, filtration, decantation and evaporation. Distillation separates mixtures by selective vaporization and condensation. Chromatography separates mixtures based on differences in solubility and adsorption. Sedimentation, filtration and decantation separate mixtures based on differences in properties like size, shape and density. Overall, the document conveys that separation techniques exploit differences in chemical or physical properties between mixture components.

1. E-CONTENT DEVELOPMENT OF
SEPARATION OF MIXTURES
1. HOME
 http://WWW.chemistry.about .com
 www.mikecurtis.org.uk/mixtures
 www.learnnext.com › CBSE IX › Science ›
 www.itschool.gov.in/pdf/std_IX/eng_medium
2. objectives
 To develop e- content on the topic separation of mixtures
 To form the concept of types of mixtures
 To form idea of technique of mixtures

2. CONCEPT MAP

3. E- CONTENT ANALYSIS
TERMS
Mixtures,separation,sedimentation, Distillation, Chromatography
FACTS
 Separations are carried out based on differences in chemical properties
 The substance moves with the solvent easily if the substance is very soluble in
the solvent
 Crude oil occurs naturally as a mixture of various hydrocarbons and impurities
 Decantation generally one from which a precipitate has settled.
CONCEPTS
Distillation is a process of separating the component substances from a liquidmixture by
selective vaporization and condensation
chromatography, the movement of each substance in the mixture depends on two factors: solubility
of the substance in the solvent and adsorption of the substance on the filter paper.
Decantation is a process for the separation of mixtures, by removing a layer of liquid, generally one
from which a precipitate has settled
Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a
gaseous phase that is not saturated with the evaporating substance
Filtration is commonly the mechanical or physical operation which is used for the separation of
solids from fluids (liquids or gases) by interposing a medium through which only the fluid can pass.
The fluid that passes through is called the filtrate
Sedimentation is the tendency for particles in suspension to settle out of the fluid in which they are
entrained, and come to rest against a barrier.

4. DIFFERENT EXAMPLES OF RELATED TOPIC
DISTILATION
SEDIMENTATION

5. chromatography
filtration

6. Conclusion
IN chemistry and chemical engineering, a separation process, or a separation technique, or
simply a separation, is a method to achieve any mass transferphenomenon that converts
a mixture of substances into two or more distinct product mixtures, at least one of which is enriched
in one or more of the mixture's constituents. In some cases, a separation may fully divide the mixture
into its pure constituents. Separations are carried out based on differences in chemical properties, or
physical properties such as size, shape, mass, density, or chemical affinity, between the constituents
of a mixture, and are often classified according to the particular differences they use to achieve
separation. In the case that no single difference can be used to accomplish a desired separation,
multipleoperations will often be performed in combination to achieve the desired end