In contrast to hydrochloric acid there is no industrial scale regeneration technology for the recovery of H2SO4 molecules available. Sulfuric acid is often used for pickling of metals, pure or as a mixture with other acids. Sulphuric acid is an oxidizing acid and can dissolve also noble metals such as copper.Īs a strong dibasic acid H2SO4 dissolves all base metals by forming hydrogen and the corresponding sulfates and hydrogen sulfates.Ī further essential feature is that sulfuric acid could decompose the salts of most other acids by forming the original acid. The above mentioned, figures were taken from the PERRY’S CHEMICAL ENGINEERS HANDBOOK SEVENTH EDITION. The following table shows the relationship between density and concentration of sulfuric acid.
The concentration of the acid can be determined easily via its density. It should be noted that sulfuric acid and water are completely miscible.
The second occurs at higher water contents. The dissociation of sulfuric acid takes place in two stages. Dilution procedure requires cooling and generally special care which is especially very important in large-scale applications. This is due to hydrate formation which released 85.4 kJ of heat per mole of sulfuric acid. Contact with water results in a very strong exothermic reaction, which could heat the acid up to its boiling point. Concentrated sulfuric acid is hygroscopic and absorbs humidity. Due to this fact it is non-corrosive and could be stored in steel tanks. It´s melting point is 10.4 ☌ and the boiling point is 279.6 ☌.Ĭommercially available concentrated sulfuric acid has a concentration of 96 to 98% and its molecules are not dissociated. Answer (1 of 3): I will work on the basis that by 10 H2SO4 solution you mean a 10 (m/v) solution This is 10 g H2SO4 in 100 mL solutuion Take 1.0 L or 1000 mL of this solution This will contain 100 g H2SO4 dissolved in the 1.0 L solution Molar mass H2SO4 98 g/mol Mol H2SO4 in 100 g 100. 100% sulfuric acid is liquid, color- and odorless. Sulfuric acid has a molecular weight of 98.08 g/mol and a density of 1,836 t/m³. I would like to give a brief overview of those inorganic acids, which are traditionally used in pickling applications.
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