Final answer:
A solution of sulfuric acid in water consists mainly of the hydrogen ion (H+), which is released when sulfuric acid ionizes upon dissolving in water. Therefore correct option is C
Step-by-step explanation:
The solution of sulfuric acid in water consists mainly of the hydrogen ion (H+). When sulfuric acid (H2SO4) dissolves in water, it ionizes to release two hydrogen ions (H+) and one sulfate ion (SO42-). The predominant species that characterizes the acidity of the solution is the hydrogen ion (H+).
Hydronium ions (H3O+) are also formed when the hydrogen ions associate with water molecules, which is common in aqueous solutions of acids. However, sulfuric acid is a strong acid, and when it dissolves, it completely ionizes to release H+ ions.