• Swedish chemist Svante Arrhenius (1859-1927) was the first to propose a theory to explain the observed behavior of acids and bases.
  • Because of their ability to conduct a current, he knew that both acid and bases contained ions in solution.
  • An Arrhensius acid is a compound, which ionizes to yield hydrogen ions (H+) in aqueous solution.
  • A monoprotic acid is an acid that contains only one ionizable hydrogen.
  • Most common polyprotic acids are either diprotic (such as H2SO4) or triprotic.
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