Question: is hcooh an acid or base?
Answer: The protonated form HCOOH is the acid and the deprotonated form HCOO- is the conjugate base. That is formic acid (HCOOH) and the formate ion (HCOO-) are a conjugate pair. In the same reaction, the water is the base (deprotonated) while H3O+ (the protonated form) is the conjugate acid.