In this lesson our instructor talks about chemical reactions. First, he discusses the Arrhenius definition, the bronsted-lowry definition, and the autoionization of water. Then he talks about oxides of metals and nonmetals, and oxidation-reduction reactions. He ends the lesson with a summary and three helpful sample problems. Chemical Reactions II Arrhenius acids ionize in water to form H+ and an anion, while Arrhenius bases ionize to form hydroxide and a cation. Bronsted-Lowry acids donate a proton to water, while Bronsted-Lowry bases accept a proton from water. The (7) strong acids dissociate completely in water. A neutralization reaction between a Bronsted-Lowry acid and base always yields a salt and water. There are several chemical aqueous reactions that form a gas byproduct. Oxidation-reduction, or redox, reactions involve a transfer of electrons and a change in oxidation number.