Hydrochloric acid is made by combining hydrogen chloride and water in a solution. The water molecules take the hydrogen atom in HCl(g) and pull it away from the chlorine atom when hydrogen chloride gas enters the water. This is how Hydrochloric Acid is made through the dissolution process.
HCl + H2O → H3O + Cl−
Hydrochloric acid is produced by dissolving hydrogen chloride gas in water. The hydrogen chloride gas can be produced through several methods, including:
- Direct synthesis: Hydrogen gas and chlorine gas are reacted at high temperatures and pressures in the presence of a catalyst, such as iron or aluminum chloride, to produce hydrogen chloride gas.
- From salt: Hydrogen chloride gas can also be produced by heating common salt (sodium chloride) with sulfuric acid.
- From organic compounds: Hydrogen chloride can also be produced by the combustion of organic compounds, such as chlorinated hydrocarbons or chlorinated methanes.
- Silica: Hydrogen chloride can also be produced as a co-product of the silica manufacturing process.
Once the hydrogen chloride gas is produced, it is then dissolved in water to create hydrochloric acid. The concentration of the acid can vary depending on the intended use, with concentrations ranging from around 5-35%. The vast majority of hydrochloric acid is derived from the chlorination of organic chemicals, and much smaller amounts come from other processes.
