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Period: to
Modern
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First Modern Acid Theory
Laurent Lavoisier developed the first modern acid theory about 1780. He thought all acids had an essential common oxygen essence. Wrong, but a start.https://en.wikipedia.org/wiki/Antoine_Lavoisier</a>Antoine
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No Oxygen Required
About 1815 Humphry Davy demonstrated that not all acids included oxygen. Required An Acid was something that reacts with base to make salt. This was better, but still not right. https://en.wikipedia.org/wiki/Humphry_Davy -
Svante August Arrhenius Gets it Right
Developed the theory still most commonly used today. Acids provide positive hydrogen ions and based provide negative hydroxyl ions in water. The theory was developed in the 1890s. Svante_Arrhenius -
Brønsted and Lowry Extend the Definition
Johannes Nicolaus Brønsted and Thomas Martin Lowry make the Arrhenius definition broader. An acid is a hydrogen ion donor in reactions even if water is not the solvent. <https://en.wikipedia.org/wiki/BrønstedâLowry_acidâbase_theory' >Brønsted and Lowry Theory</a> -
Gilbert N. Lewis Extended the Acid Definition Too
Lewis extended the definition of acids to include electron-pair acceptors even when hydrogen ions are not directly involved. Lewis acids include substances that had not been thought of as acids before.
Lewis
