We have learned that metals such as copper, iron and aluminum are good conductors of electricity. In addition to these well-conducted electricity and aqueous solutions of acids, pom bases and salts, as well as the water itself (remember to constantly warn us that we do not have electrical appliances near water).
When the dissolution of ionic compounds (base and salts) in the water, there are attractive forces pom between ions and their polar water molecules. Bases and salts that spontaneously decompose pom when the positive ions and negative ions of metal hydroxide groups, and acid residues, which are surrounded by polar water molecules. This phenomenon is called HYDRATION JONA.
By the same theory, pom acids are substances that dissociates in water to give a positive ions of hydrogen ions H +, while BASE substance that dissociates in water as negative ions give hydroxide ions OH groups -.
SALT dissociates in water, resulting positive ions or metal cations and negative ions or anions acid residue. If acid residue contains only nonmetal, bezkiseonična acid (HCl or H 2 S), then the negative ion only the nonmetal. When oxygen acid (sulfuric, sulfurous, phosphoric, nitric, carbonic) negative pom ion is the entire atomic group (SO 4, SO 3, PO 4, NO 3, CO 3).
NaOH Na + + OH -
Hydroxyl group, OH is always pom one time negative pom ion OH -. Number of OH groups in the hydroxide depends on the valence of the metal and the number of the writing dissociation reaction is written in front of the OH group as a factor.
It is important to observe acid residue as a group. If there are more acidic residues (index behind parentheses), then he is writing dissociation pom reaction moves to the position of the coefficient and the acid residue is many times what it was negative valence, pom or how many hydrogen atoms in the acid.
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