Hydrochloric acid

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Hydrochloric acid is a strong corrosive acid that is commonly used as a laboratory reagent. It is formed by dissolving hydrogen chloride in water. Gastric acid is the hydrochloric acid component of gastric juice.Molecular formula HCl[1], the acid is monoprotic- one proton is able dissociate from the molecule to lower pH. It is a strong Brønsted–Lowry acid as it has a high Ka[2] and donates a proton[3].

HCL is routinely used in chemical research laboratories and manufacturing plants. Its applications include the large-scale production of certain compounds (such as vinyl chloride for polyvinyl chloride (PVC) plastic), removal of rust and scale from metals, petroleum production, and ore processing.How HCL dissociates in water:

HCl + H2O ⇌ H3O+ + Cl[4]


  1. Source: ILO-ICSC Record Name: HYDROGEN CHLORIDE URL: http://www.ilo.org/dyn/icsc/showcard.display?p_card_id=0163 Description: International Chemical Safety Cards (ICSC) are data sheets intended to provide essential safety and health information on chemicals in a clear and concise way.Peer-Review Status: 04.10.2000 Validated
  2. http://www.chembuddy.com/?left=BATE&right=dissociation_constants
  3. https://www.boundless.com/chemistry/textbooks/boundless-chemistry-textbook/acids-and-bases-15/acids-and-bases-107/the-bronsted-lowry-definition-of-acids-and-bases-450-8397/
  4. http://www.newworldencyclopedia.org/entry/Hydrochloric_acid
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