What is hydrogen sulfuric acid?

Hydrosulfuric acid is a very toxic compound, which is made by dissolving hydrogen sulfide in water Hydrogen sulfuric acid is classified as weak acid, which is characterized by strong smell (reminiscent of rotten eggs), nicknamed "sewer gas" This kind of acid is abundant in the earth's crust It is not only the main part of volcanic emissions, but also exists in a variety of petrochemical fuels, including crude oil and natural gas Although both contain hydrogen and sulfur, hydrogen sulfuric acid and sulfuric acid are totally different chemicals To make hydrosulphuric acid, hydrogen sulfide gas must be dissolved in water Each of its molecules contains two hydrogen atoms and one sulfur atom, making its molecular weight 34.08 The acid itself is relatively weak (especially compared to sulfuric acid) The pH value of sulfuric acid is very low, which is 1.0, while the pH value of hydrogen sulfuric acid is 4.5, which is similar to that of banana and tomato juice Many fossil fuels contain hydrogen sulfide In fact, one of the easiest ways to produce it is to separate it from "acid gas", a natural gas with a concentration of about 90% hydrogen sulfide Although not common in crude oil, it still occurs frequently It is very dangerous to exist in well water in the form of hydrogen sulfide It needs to be oxidized by ozone or manganese filter to make it inert and non-toxic Compared with other acids, hydrogen sulfide is not a frequently produced or used chemical because of its limited use Although it can be produced by burning sulfur with hydrogen, hydrogen sulfuric acid can also be reversed to elemental sulfur Chemists also use it as an analytical tool because it can detect metal elements in solutions Other applications include using it to separate heavy water, a water made from deuterium rather than hydrogen, which is useful in specific nuclear reactors Hydrogen sulfuric acid is as toxic as cyanide and a dangerous chemical (especially gaseous) One of its most dangerous properties is the strong and uncomfortable smell Although the low concentration is harmless, the inhalation amount reaches the toxic level, which will lead to human death During the first World War, Britain used it as a chemical warfare agent In addition, a series of suicides in Japan in 2008 were also related to hydrogen sulfuric acid Some paleontologists think it played an important role in the extinction at the end of the Permian (about 250 million years ago).