Final answer:
5% rubbing alcohol is classified as a homogeneous mixture because the composition is consistent throughout without any visible separation of different phases.
Step-by-step explanation:
The classification for 5% rubbing alcohol is a homogeneous mixture, also known as a solution. This is because the alcohol is uniformly distributed throughout the water, resulting in a single-phase system where the composition is consistent throughout the mixture.
Rubbing alcohol, which typically contains isopropanol (isopropyl alcohol) or ethanol, mixed with water, does not show any visible separation of different phases, hence it is not a heterogeneous mixture, but rather a homogeneous one.