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Methods of Separating
I love chocolate especially at Friday, May 8, 2009 | back to top, baby

Separating Mixture/Compounds

There are many ways to separate mixtures/compounds. Eg. Filtration, Using Magnet etc. These are some ways to separate mixtures/compounds.

Chromatography

There are many types of chromatography. For example, Planar chromatography , Paper chromatography and Thin layer chromatography. As we are still Sec 1s we only use paper chromatography (so far) so I will be talking about that :D

Paper chromatography is a technique that involves placing a small dot or line of sample solution onto a strip of chromatography paper. The paper is placed in a jar containing a shallow layer of solvent and sealed. As the solvent rises through the paper, it meets the sample mixture which starts to travel up the paper with the solvent. The small dot/line of sample solution will then split into many different parts if it is not pure.

Crystallisation
Crystallization is the (natural or artificial) process of formation of solid crystals precipitating from a solution, melt or more rarely deposited directly from a gas. Crystallization is also a chemical solid-liquid separation technique, in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs.

Distillation
Distillation is a method of separating mixtures based on differences in their volatilities in a boiling liquid mixture. Distillation is a unit operation, or a physical separation process, and not a chemical reaction.
Commercially, distillation has a number of uses. It is used to separate crude oil into more fractions for specific uses such as transport, power generation and heating. Water is distilled to remove impurities, such as salt from seawater. Air is distilled to separate its components—notably oxygen, nitrogen, and argon—for industrial use. Distillation of fermented solutions has been used since ancient times to produce distilled beverages with a higher alcohol content. The premises where distillation is carried out, especially distillation of alcohol, are known as a distillery.

Filtration (using filter paper)
First, there must be some liquid with insolubles inside. Then, using a filter funnel and paper, you pur the liquid into the filter funnel and let it filter into a beaker of some sort. When filtered, the solid particles, i.e. the residue, will be collected on the filter paper.