Final answer:
A solution where NaOH is 100% ionized is classified as a strong base.
Step-by-step explanation:
A solution where NaOH is 100% ionized is classified as a strong base. Strong bases are substances that dissociate almost 100% into ions in water. NaOH, or sodium hydroxide, is an example of a strong base that produces hydroxide ions (OH-) when dissolved in water.