Question

what would coffee, at a ph of 4, be considered?
acidic
a buffer
basic

Explanation:

The pH scale ranges from 0 - 14. Substances with pH < 7 are acidic, pH = 7 are neutral, and pH > 7 are basic. Since coffee has a pH of 4 which is less than 7, it is acidic. A buffer is a solution that resists pH changes and is not relevant here based on the question.

Answer:

A. acidic