What ion is produced when alkali dissociates?

When alkali dissociates in solution, it produces hydroxyl ions (OH-). Alkalis are substances that release hydroxide ions when dissolved in water, resulting in an increase in the pH of the solution, making it basic. This behavior is characteristic of alkalis, which include substances like sodium hydroxide (NaOH) and potassium hydroxide (KOH).

The production of hydroxyl ions is fundamental in many chemical processes, particularly in titrations and neutralization reactions where the presence of these ions can influence the properties of a solution. In contrast, the other ions listed are produced from different types of compounds and do not result from the dissociation of alkalis. For instance, carbonate ions are associated with carbonic acid and bases like sodium carbonate, while chloride ions come from compounds like sodium chloride. Sulfate ions are produced from sulfuric acid and its salts. Understanding the specific ions produced by different substances is critical for applications in cathodic protection and electrochemistry.