The identification of each substance treated as an acid or substance should be Liquid drain cleaner: Base and Milk: Acid
What are acid and base?
Acid should be treated as the hydrogen that contained the substance where the proton should be donated to the other substance. While on the other hand, the base represent the molecule for accepting the hydrogen ion from an acid. Also if the pH scale should be above 7 so it should be treated base while below should be treated as the acid.
Learn more about acid here: https://brainly.com/question/21066105
