Final answer:
In chemistry, acids produce hydrogen ions and bases produce hydroxide ions in solution, according to the Arrhenius definition. Acids donate protons and bases accept protons according to the Brønsted-Lowry definition. Acids are electron pair acceptors while bases are electron pair donors, according to the Lewis theory.
Step-by-step explanation:
In chemistry, acids and bases have been defined differently by three sets of theories: One is the Arrhenius definition, which states that acids are substances that produce hydrogen (H+) ions in solution, while bases produce hydroxide (OH-) ions in solution. Another definition is the Brønsted-Lowry definition, which defines acids as substances that donate protons and bases as substances that accept protons. The Lewis theory of acids and bases states that acids are electron pair acceptors while bases are electron pair donors.