In aqueous solutions, hydronium ions (H3O+) and hydroxide ions (OH-) play crucial roles. Hydronium ions, formed when hydrogen ions dissolve in water, indicate acidity, while hydroxide ions signify basicity. Their concentrations are determined by acid dissociation (Ka) and base dissociation (Kb) constants, and measured using the pH and pOH scales. Acid-base reactions between acids (H+ donors) and bases (H+ acceptors) produce salts and water, while the properties of aqueous solutions are influenced by their ability to dissolve ionic compounds.
