logical continuation of the periodic law is the classification of inorganic compounds.As the classification of the elements themselves, the classification of chemical compounds visually reflected in the periodic table and is therefore a legitimate objective and scientifically sound.
important classes of inorganic compounds: salts, acids, acids, bases (hydroxides).
Classification of substances greatly facilitates the process of learning.Quite simply characterize the properties of individual representatives of various classes, if you know the typical chemical properties of the analyzed class.
classes of inorganic compounds: oxides
oxides - compounds with oxygenic elements, in which the latter is joined to the atom of the element.In fact, all the elements except the three inert - argon, helium, neon - form oxides.
classes of inorganic compounds: oxides hydrates
vast majority oxides directly or direct connection with water, called hydrates oxides or hydroxides.Gidrokisida composition expressed by the general formula E (OH) x, wherein E - an element that forms a hydroxide, x - indicates the degree of oxidation in a respective oxides.
Depending on the chemical nature of the element hydrates, hydroxides divided into basic oxides (base), amphoteric oxide hydrates (hydroxides of amphoteric), acid oxides hydrates (acid).Membership hydroxide to a class of compounds is determined by a placement element in the periodic system, which leads to the relative stability of relations between the member and the oxygenic - on the one hand, and between oxygenic hydrogenic and - on the other.
classes of inorganic compounds: acid
Acids include chemical compounds consisting of several atoms of Hydrogen, which is able to move to the metal to form salts.Groups of atoms which remain after cleavage from the molecule acid Hydrogen atoms, called acid residue.
classes of inorganic compounds: salt
salts are considered as products of partial or complete substitution of Hydrogen atoms to metal atoms or OH groups on the grounds acid residues.In some cases Hydrogen in acids can be replaced, not only metal, but also other groups of atoms which have a positive charge (cations).Depending on the composition and properties of the salt are divided into such types: acidic, basic, medium and complex.
Medium (normal) salt formed as a result of the full replacement of Hydrogen atoms on metal acid (cation), or hydroxyl groups on the grounds of acidic residues.The degree of oxidation of the metal and the charge of the acid residue should know in order to be able to draw up a formula for the mean salt.They are joined together in such proportions that the salt was electrically neutral.
acid salts obtained by partial substitution of atoms Hydrogen acids in the metal.Acid salts are formed only polybasic acid.The process of acid salts of formula is such as to medium salts: Measured cationic charge and an acid residue, and the particles are joined together in a ratio that does not violate the principle of electroneutrality molecules.
basic salts obtained by partial substitution of the OH groups of bases or hydroxides of amphoteric into acidic residues.Formula basic salts consist of residues mnogokislotnyh bases or amphoteric hydroxides, partially lost hydroxyl groups, and acid residues.As in all previous versions must always adhere to the principle of electrical neutrality.
