Final answer:
Oxidation-reduction or redox reactions involve the exchange of electrons between reactant species. These reactions typically do not involve the switching of counterions.
Step-by-step explanation:
Oxidation-reduction reactions, also known as redox reactions, involve the exchange of electrons between reactant species. These reactions typically do not involve the switching of counterions. For example, in the reaction between sodium and chlorine to yield sodium chloride, electrons are transferred from sodium to chlorine, forming an ionic bond and resulting in the formation of NaCl. This reaction is a redox reaction because of the exchange of electrons, but it does not involve the switching of counterions.