Data expansion:
Calcium bicarbonate is an inorganic acid salt with the chemical formula of Ca(HCO? )? , soluble in water, with a relative molecular weight of 162.06. Calcium bicarbonate can be obtained by the reaction of sodium bicarbonate and water-soluble calcium salt. Calcium bicarbonate is relatively stable below 0 degrees Celsius; It is easy to decompose at room temperature to obtain calcium carbonate solid.
Physical and chemical properties:
Chemical formula ca (HCO 3) 2; The relative molecular weight is 162.06, and calcium carbonate is dissolved in carbonic acid to form calcium bicarbonate. Evaporating the calcium bicarbonate solution to obtain calcium carbonate solid. Dissolve in water, and decompose by heating; Forming common salt with alkali.
When calcium carbonate meets carbon dioxide and water, it will chemically corrode and produce soluble calcium bicarbonate, which will lead to the phenomenon of "dripping water wears away the stone" for a long time. Equation: CaCO3+CO2+H2O==Ca(HCO3)2.
When calcium bicarbonate is dissolved in water, its aqueous solution is also called "hard water". Groundwater is hard water. The water in rivers, lakes and seas is not "hard water" (hard water refers to metal cations such as calcium ions and magnesium ions, and their carbonates are insoluble in water. Hard water inspection method: pour soapy water into it and shake it. If white scale is produced, the raw water is hard water.
Introduction of sodium hydroxide:
Sodium hydroxide, also known as caustic soda, caustic soda and caustic soda, is an inorganic compound with the chemical formula of NaOH. Sodium hydroxide is strongly alkaline and corrosive, and can be used as acid neutralizer, complexing masking agent, precipitant, precipitation masking agent, color developing agent, saponifying agent, stripping agent, detergent, etc. , and is widely used.
August 26th, 2023: CSRC agreed to register caustic soda futures and options in Zhengzhou Commodity Exchange. In the next step, the CSRC will urge Zhengzhou Commodity Exchange to do a good job to ensure the smooth launch and steady operation of caustic soda futures and options.