Grades of sulfuric acid

Although nearly 100% sulfuric acid solutions can be made, the subsequent loss of {{chem2 at the boiling point brings the concentration to 98.3% acid. The 98.3% grade, which is more stable in storage, is the usual form of what is described as "concentrated sulfuric acid". Other concentrations are used for different purposes. Some common concentrations are:

"Chamber acid" and "tower acid" were the two concentrations of sulfuric acid produced by the lead chamber process,

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