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Lab #2 PHYSICAL SEPARATION TECHNIQUES Introduction

Lab #2 PHYSICAL SEPARATION TECHNIQUES Introduction When two or more substances, that do not react chemically, are blended together, the result is a mixture in which each component retains its individual identity and properties. The SEPARATION of the components of a mixture is a problem frequently encountered in chemistry. The basis of the SEPARATION is the fact that each component has a different set of PHYSICAL and chemical properties. The components are pure substances which are either elements or compounds. Under the same conditions of pressure and temperature, the properties of every sample of a pure substance are identical. Each sample melts at the same temperature, boils at the same temperature, has the same solubility in a given solvent, etc.

CHROMATOGRAPHY is the process of separating a mixture by the distribution of its components between two phases, one phase being stationary and the other phase moving. Some examples of chromatography are gas chromatography, paper ... mixture, they can decide what physical separation techniques will best allow them to separate the mixture. In the ...

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