||Arabic chemists find out how to make sulphuric, nitric, and hydrochloric acids.
||Irish chemist Robert Boyle wrongly suggests that acids contain special particles that sqeeze into gaps in metals, breaking them apart.
||The writing of French Chemist Auguste Laurent proves that all acids contain hydrogen.
||Swedish chemist svante Arrhenius proposes that all acids contain hydrogen ions and these give acids their special properties.
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