Humber Admissions Practice Test 2026 - Free Practice Questions and Study Guide for Humber College Admissions

Ionic compounds in aqueous solutions primarily participate in double-displacement reactions due to their ability to dissociate into their constituent ions when dissolved in water. In a double-displacement reaction, two ionic compounds exchange their ions, forming new compounds, typically resulting in a precipitate, gas, or a weak electrolyte.

In contrast, combination reactions involve the formation of a single product from two or more reactants. While ionic compounds can theoretically be involved, they do not specifically utilize the exchange of ions characteristic of double-displacement reactions. Similarly, combustion reactions typically involve the reaction of a substance with oxygen, producing heat and light, and are usually not characterized by the interactions between ionic compounds in solution.

Thus, the focus on double-displacement reactions best captures the dynamic nature of ionic compounds in aqueous environments, making it the most relevant choice for the context of ionic interactions involved in aqueous solutions.