Some introduction of Silicon Dioxide SiO2 china
(1) Most of the acidic oxides can directly combine with water to form acid, but SiO2 cannot directly combine with water. Its corresponding hydrate, silicic acid, can only be obtained by reacting the corresponding soluble silicate with acid (silicic acid is insoluble in water and is a weak acid, and its acidity is weaker than carbonic acid).
(2) Acidic oxides generally do not react with acids, but SiO2 can react with hydrofluoric acid to generate gaseous silicon tetrafluoride.
The main component of ordinary glass and quartz glass is Silicon Dioxide SiO2 china. Therefore, hydrofluoric acid can be used to etch glass. Use hydrofluoric acid to engrave on glass. In the laboratory, hydrofluoric acid cannot be used in glass, ceramics, porcelain, and pottery containing Silicon Dioxide SiO2 china. Generally, plastic bottles can be used.
(3) The reaction of SiO2 with strong alkali solution can generate water glass, which is a kind of mineral glue and is often used as a binder. Therefore, the reagent bottle containing the alkaline solution in the laboratory does not use a glass stopper, but a rubber stopper.