It attacks reactive metals (metals at positions above copper in the reactivity series) such as iron, aluminium, zinc, manganese, magnesium, and nickel. Sulfureted hydrogen. It can also be produced by treating hydrogen with molten elemental sulfur at about 450 °C. A solution of copper (II) sulfate can be electrolyzed with a copper cathode and platinum/graphite anode to give spongy copper at cathode and evolution of oxygen gas at the anode, the solution of dilute sulfuric acid indicates completion of the reaction when it turns from blue to clear (production of hydrogen at cathode is another sign): More costly, dangerous, and troublesome yet novel is the electrobromine method, which employs a mixture of sulfur, water, and hydrobromic acid as the electrolytic solution. As of 2010, this phenomenon has occurred in a number of US cities, prompting warnings to those arriving at the site of the suicide. Concentrated sulfuric acid has a very powerful dehydrating property, removing water (H2O) from other chemical compounds including sugar and other carbohydrates and producing carbon, heat, and steam. Catalysts used in hydrodesulfurization are routinely activated with hydrogen sulfide, and the behavior of metallic catalysts used in other parts of a refinery is also modified using hydrogen sulfide. Sulfuric acid is formed naturally by the oxidation of sulfide minerals, such as iron sulfide. When allowed to react with superacids, sulfuric acid can act as a base and be protonated, forming the [H3SO4]+ ion. These metal sulfides, such as ferrous sulfide FeS, are often black or brown, leading to the dark color of sludge. [7][8] Accordingly, it rapidly attacks the cornea and can induce permanent blindness if splashed onto eyes. When combined with elemental oxygen at high temperatures, it can produce elemental sulfur and water, known as the Clauss reaction. © 2020  Merck KGaA, Darmstadt, Germany and/or its affiliates. In the early to mid nineteenth century "vitriol" plants existed, among other places, in Prestonpans in Scotland, Shropshire and the Lagan Valley in County Antrim Ireland where it was used as a bleach for linen. As an acid, sulfuric acid reacts with most bases to give the corresponding sulfate. CAS No. Several groups of bacteria can use hydrogen sulfide as fuel, oxidizing it to elemental sulfur or to sulfate by using dissolved oxygen, metal oxides (e.g., Fe oxyhydroxides and Mn oxides), or nitrate as electron acceptors.[86]. H2NaS. In this model of the origin of life on Earth, geologically produced hydrogen sulfide is postulated as an electron donor driving the reduction of carbon dioxide. For example, the blue copper salt copper(II) sulfate, commonly used for electroplating and as a fungicide, is prepared by the reaction of copper(II) oxide with sulfuric acid: Sulfuric acid can also be used to displace weaker acids from their salts. Directly dissolving SO3 in water is not practiced. Although very pungent at first (it smells like rotten eggs[44]), it quickly deadens the sense of smell, so victims may be unaware of its presence until it is too late. This page was last changed on 29 August 2020, at 01:44. [36], Besides living near a gas and oil drilling operations, ordinary citizens can be exposed to hydrogen sulfide by being near waste water treatment facilities, landfills and farms with manure storage. [15], Reversibly sodium sulfide in the presence of acids turns into hydrosulfides and hydrogen sulfide; this supplies hydrosulfides in organic solutions and is utilized in the production of thiophenol.[27]. -021. The compounds of sulfur and iodine are recovered and reused, hence the consideration of the process as a cycle. The presence of the hydronium ion, H3O+ is also present. Exposure to lower concentrations can result in eye irritation, a sore throat and cough, nausea, shortness of breath, and fluid in the lungs (pulmonary edema). In common with other corrosive acids and alkali, it readily decomposes proteins and lipids through amide and ester hydrolysis upon contact with living tissues, such as skin and flesh. If you find a lot number with a filling-code such as [90], Freshwater springs rich in hydrogen sulfide are mainly home to invertebrates, but also include a small number of fish: Cyprinodon bobmilleri (a pupfish from Mexico), Limia sulphurophila (a poeciliid from the Dominican Republic), Gambusia eurystoma (a poeciliid from Mexico), and a few Poecilia (poeciliids from Mexico). [18] The field of H2S biology advanced from the environmental toxicology area to investigate the roles of endogenously produced H2S in physiological conditions and in various pathophysiological states. It is typically removed by amine gas treating technologies. However, even the normal laboratory "dilute" grade (approximately 1 M, 10%) will char paper if left in contact for a sufficient time. 57.07 g/mol. Sulfuric acid is used for a variety of other purposes in the chemical industry. sodium hydrogen sulphide. In addition, hydrogen sulfide gas burns and produces other toxic vapors and gases, such as sulfur dioxide. (Only two other such gases are currently known: nitric oxide (NO) and carbon …

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