Inorganic Chemistry

Non-metallic minerals refer to minerals that do not have metallic or semi-metallic luster, are colorless or have various light colors, are transparent or translucent under a 0.03 mm thick sheet, and have poor electrical and thermal conductivity. It includes most of the oxygenated salt minerals and some oxide and halide minerals. As an important material basis for human survival and development, non-metallic minerals have long coexisted harmoniously with humans and are closely related to the environment, ecology and health.

Oxides are compounds (of course they must be pure). Its composition contains only two elements, one of which must be oxygen, the other if it is a metal element, it is called a metal oxide; if the other is not a metal element, it is called a non-metal oxide. Peroxide refers to a compound containing peroxy-O-O-. It can be regarded as a derivative of hydrogen peroxide, which contains peroxide ions in its molecules. Peroxides are divided into inorganic peroxides and organic peroxides.

Inorganic acid, also known as mineral acid, is a general term for acids in inorganic compounds. Inorganic acids are generally inorganic compounds that can dissociate hydrogen ions. A compound consisting of hydrogen and a non-metallic element or group. According to the composition, inorganic acids can be divided into oxyacids, anaerobic acids, complex acids, mixed acids, superacids, etc. According to the degree of dissociation, they can be divided into strong acids and weak acids, and according to the ionizable hydrogen ion The number is divided into monobasic acid, dibasic acid and polybasic acid.

Industrial gas is a bottled compressed liquid gas, which is in a gaseous state at normal temperature and pressure. There are many types of gas, and it is mainly used in various industrial manufacturing. There are many types of gas products, which can be roughly divided into two categories: general industrial gas and special gas. General industrial gas production and sales are large, but the purity requirements are not high. Although the production and sales of special gases are small, they have extremely strict requirements on the purity or composition of different special gases, the maximum allowable content of harmful impurities, and the packaging, storage and transportation of products. .