Ethyl alcohol is a clear, colorless liquid with a characteristic odor. Its density - about 0.8 grams / cubic centimeter.
What is the chemical formula of ethyl alcohol?
Ethanol ( "Ethanol" InternationalChemical classification) widely used in medicine as a disinfectant, as well as in some industrial fields as a solvent, oil, antifreeze components. In addition, ethanol - the main active component of alcoholic beverages.
Why is the structural formula of ethanol is not accurate enough
The formula of any chemical shouldcontain information about the number and type of atoms contained in the molecule. Ethanol is composed of three elements: carbon (C), hydrogen (H) and oxygen (O). Moreover, each molecule comprises ethanol or 2 carbon atoms, hydrogen atoms 6 and 1 oxygen atom. Hence, the empirical (simplest) formula of this chemical compound is written as follows: S2N6O. It would seem that this is quite enough.
However, the use of only one empiricalformula can lead to error. The fact that the same S2N6O formula applies to other substance - dimethyl ether while it under normal conditions in a gaseous state rather than a liquid, such as ethanol. And, of course, the chemical properties of this substance are also different from the properties of ethanol.
Therefore, use only one empirical formula to describe the ethanol can not.
What is the structural formula of ethanol
In such cases come to the aid of more accuratestructural formulas, which contain information not only on the number and type of atoms of the elements in the molecule, but also on their location, the mutual relations. The structural formula is ethanol: C2H5OH or more precisely - CH3-CH2-OH. This formula indicates that the ethanol molecule is composed of two main parts: the ethyl radical and hydroxyl radical C2H5 (often referred to as hydroxyl-group) OH.
With structural formula we can concludechemical properties of the substance caused by the presence in its structure very active hydroxyl groups, in which the side of the oxygen atom, the electronegativity second (after fluorine) element biased electron density of molecules.
For comparison, the structural formula mentioned dimethyl ether CH3-O-CH3. That is, it is a symmetrical molecule.
Formula C2H5OH very simple and usually very easy to remember, it is read as "Ce two of the five Al Al".