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Criteria of purity of organic compounds

6 years ago

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After purification, the test of purity of an organic compound is the nest important step. A pure organic compound possesses characteristic physical properties such as refractive index, specific gravity, boiling point, crystalline structure and melting point. If a purified sample shows the same properties that the pure substance is known to possess, it may be considered as pure and no further purification is required. However for practical purpose in laboratory only melting point and boiling point are used as criteria for purity.


A pure organic solid has a definite and sharp (sudden, rapid and complete) melting point, while an impure substance has a lower and indefinite melting point.


The melting point of a solid may be defined as the temperature at which the solid and liquid states of the compound are in equilibrium with each other at an external pressure of l atmosphere.

6 years ago

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Asta­tine molecular weight
 
 
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Gavvala Ganesh 5 months ago
 
Asta­tine molecular weight 210
 
RAKESH CHINDAM 5 months ago
 
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WHat is the IUPAC name of the compound H-CHO????????????
 
 
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sudarshan one month ago
 
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Can there be any temperature below absolute zero(0 K)??If not,why not???
 
 
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My question is why is it not possible to obtain a temperature of less than 0 K??????????
 
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KALYAN one month ago
 
A nucleophile is a chemical species that donates an electron pair to an electrophile to form a chemical bond in relation to a reaction. All molecules or ions with a free pair of electrons...
 
Gaddam Chethan one month ago
 
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