Xiaohai Hot Springs Management Office covers an area of 23 mu, with beautiful scenery and pleasant scenery. This is a garden-like building complex surrounded by high walls covered with glazed tiles. Known as "the first spring in northern Jiangsu", Xiaohai Hot Spring has first-class convalescent doctors and facilities. Hot spring seismic station is one of the only 50 seismic stations in China with advanced testing methods. Comfortable rooms, top-class bathing and swimming facilities, special restaurants, fully-functional conference halls, diverse venues, exotic flowers, winding wooden bridges, hexagonal pavilions, streams and fish ponds combine to form a good place for meetings, leisure, scenic spots, recuperation and holidays. Xiaohai Hot Spring Sanatorium is located in the eastern suburb of Xiaohai Town, Dafeng City, Jiangsu Province. Here, the countryside is fragrant, the spring blossoms are warm, the autumn fruits are fragrant, and the farmhouses are dotted with cicadas and frogs, under the fertile soil of hot springs.
Xiaohai Hot Spring was discovered in 196 1. The East China Petroleum Exploration Team is exploring here. When the probe reaches the stratum with the depth of 14538+0.438+0 m, a warm spring gushes out.
2. Dongtai Tainan Hot Spring Sanatorium is located in Tainan Town, Dongtai City. There is a resort, which is said to be the place where the seven fairies bathe when they come down to earth. It is called Phoenix Spring.
When people talk about salt in daily life, they mean salt.
In chemistry or industry: salt is a general term for a class of substances. NaCl, a component of salt, belongs to a kind of salt.
How do people get NaCl?
Sun salt!
On the endless beach, the seawater was trapped in a salt pond, the sun dried the salt water, and the dissolved sodium chloride in the seawater crystallized out. About 30 kilograms of salt can be obtained from one ton of seawater. This is coarse salt. Sun exposure and wind blowing are conducive to accelerating the movement of water molecules, thus contributing to the precipitation of salt crystals.
When the temperature rises in the sun, the solubility of NaCl does not change obviously with the temperature, but due to the decrease of water evaporation (solvent), NaCl saturates and precipitates crystals. For MgCl2 and Cacl2, although water has evaporated, their solubility (solubility) has been enhanced, so it will not precipitate.
Because the main component of salt is NaCl. The solubility of NaCl does not change obviously with the temperature, and the amount of solvent remains unchanged when the temperature decreases, so NaCl does not precipitate, which is not conducive to the preparation of NaCl.
When the crude salt is crystallized from seawater, it will inevitably carry some sediments and impurities. In addition to sodium chloride, there are magnesium chloride and calcium chloride in seawater, which are also mixed with sodium chloride to crystallize.
However, these impurities have different properties from sodium chloride. Sodium chloride does not absorb moisture, while magnesium chloride and calcium chloride absorb water easily and regain moisture. It is these impurities that make the coarse salt in the kitchen wet on rainy days. The refined salt is obtained by recrystallization of crude salt. Refined salt is relatively pure sodium chloride, which is still dry after long-term storage. Chemistry is everywhere in life: food, medicine, building materials and chemical raw materials. ........................................................................................................................................................