Final answer:
A solution where HCl is 100% ionized is classified as a strong acid.
Step-by-step explanation:
Strong Acid vs Weak Acid:
In chemistry, an acid is classified as either strong or weak. A strong acid, like hydrochloric acid (HCl), is 100% ionized in water, meaning it completely breaks apart into hydrogen ions (H+) and chloride ions (Cl-). On the other hand, a weak acid only partially ionizes in water, resulting in a lower concentration of ions.
Example:
Hydrochloric acid (HCl) is a strong acid because it dissociates completely:
HCl (aq) → H+ (aq) + Cl- (aq)