Inorganic Compound Classification

- Sep 15, 2017 -

Inorganic compounds, compounds has nothing to do with the body (a few related to the body of the compound and inorganic compound, such as water), and organic compounds, usually refers to do not contain carbon compounds, including carbon oxide, carbonate, carbonate, cyanide, etc., hereinafter referred to as inorganic substances.

The vast majority of inorganic materials can be classified into four categories: oxide, acid, alkali and salt. The inorganic substances in the organism mainly include water and some inorganic ions such as Na +, K +, Ca2 +, Mg2 +, Cl -, SO42 -, etc. Almost contains all the elements in nature exist in the human body tissues, which in addition to carbon, hydrogen, oxygen and nitrogen mainly exists in the form of organic compounds, the rest are collectively referred to as inorganic minerals (or ash). So, mineral mainly consists of: water and inorganic salt, the water can be classified as: bound water and free water and bound water is important components of cellular structure, free water is a good solvent, transport material, participate in chemical reactions. Inorganic salt can be divided into: ion and compound, ion is the life activity that maintains cell normal, compound is the important constituent of compound inside cell.


It consists of two elements, one of which is a compound of oxygen. The substance that can react with oxygen is called an oxide. According to the chemical properties, the oxide can be divided into acidic oxide and alkaline oxide. Acid oxide: an oxide that ACTS as an acid or salts with water. For example, sulfur trioxide, phosphorus oxide, carbon dioxide, etc., most of which are acidic oxides.

Alkaline oxides: oxides that can react with acids to form salts and water, and products can only have salt and water, and no other substances can be produced. Basic oxides include active metal oxide and other metals with low - price oxides such as CaO, BaO, and CrO, MnO.

Inorganic acid

A group of compounds that can ionize and produce H in an aqueous solution. Ionization in hydrochloric acid, sulfuric acid, nitric acid in aqueous solution, the anion (the acid radical) is different, but the cation (H) is the same, so they have a common place in nature, such as acidity; It can dissolve a lot of metal; Can make blue litmus test paper turn red and so on. A narrow definition: ionized cations in aqueous solutions are all compounds of hydrogen ions (such as sulfuric acid). Most of these substances are soluble in water, and a few, such as silicic acid, are difficult to dissolve in water. The aqueous solution of acid is generally conductive, and some acids exist in the form of molecules in the water and do not conduct electricity. Partial acid is dissociating into positive and negative ions in water, which can conduct electricity.

More broadly defined: the reaction can provide protons with acids that define acids as the recipients of electronic pairs, and the range is broader. Acids neutralize the base, producing water and salt.


A substance that tastes bitter and can change the color of a specific indicator (such as turning the litmus blue, making the phenolphthalein red, etc.), and the PH value is greater than 7. All ions ionized in aqueous solutions are hydroxide ions, which react with acids to form salts and water. Typical alkaloids such as amine (including ammonia), caustic soda (sodium hydroxide), and hydrated lime (calcium hydroxide). The more general concept of a base is the material that provides the electron, or the substance that accepts the proton

Common items

Carbon dioxide

Colorless odorless gas, acid, soluble in water (volume ratio 1:1), partially carbonic acid. Gaseous carbon dioxide is used to make alkali industry and sugar industry, and it is used for the hardening of steel castings and the manufacture of lead-white. It can be burned by carbon in excess air or made of marble, limestone, dolomite calcination or acid, as a by-product of industries such as lime and fermentation. Carbon dioxide generally does not burn and does not support combustion. At normal temperature, the density is slightly larger than the air, and when heated, it will concentrate on the top, often used as an extinguishing agent. Carbon dioxide is an indispensable raw material for photosynthesis of green plants. Carbon dioxide is commonly used as fertilizer in greenhouse. Solid carbon dioxide, commonly known as dry ice, can absorb a lot of heat when it is sublimated, so it is used as a refrigerant, such as artificial rainfall, and is used to create smoke in the dance.

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