Salt introduction:
In chemistry, salt refers to a metal ion or ammonium ion (NH? +) Compounds combined with acid radical ions, such as calcium sulfate, copper chloride and sodium acetate, generally speaking, salts are the products of double decomposition reactions, such as sulfuric acid and sodium hydroxide to generate sodium sulfate and water, and other reactions can also generate salts, such as displacement reactions.
Salt can be divided into single salt and double salt. Single salt has normal salt, acid salt and alkaline salt, and double salt has double salt and double salt. Among them, besides metal ions and acid radical ions, acid salts also contain hydrogen ions.
Basic salts contain not only metal ions and acid ions, but also hydroxide ions. The compound salt can be dissolved in water, and can generate the same combined salt as the original salt ion. When the double salt is dissolved in water, a double salt complex with complex ions different from the original salt can be formed.
Insoluble salts are usually solids under standard conditions, but there are exceptions, such as molten salts and ionic liquids. Soluble salt solution and molten salt are conductive, so they can be used as electrolytes. There are many different salts in cytoplasm, blood, urine and mineral water.
Terminology:
Generally, the name of anaerobic acid salt is the name of nonmetal element before the name of metal element, and the addition of the two names is called a chemical name. If it is an oxyacid salt, the name of the salt is the name of the acid followed by the name of the element, and the element is called the acid.
If a metal element has multiple valences, the name of the salt formed at a low price is to add nitrite before the name of the metal element, such as copper chloride. If the valence of copper is +2, the formed salt CuCl2 is called copper chloride, and if the valence is+1, the formed salt CuCl is called "cuprous chloride".
A salt containing the same cation or anion is generally referred to as "monosalt", such as "sodium salt" and "sulfate".