The conjugate base of HCOOH (formic acid) is HCOO– (formate ion).
When an acid donates a proton (H+), what remains is called the conjugate base. In the case of formic acid, when it loses a proton, it becomes the formate ion, which can participate in various chemical reactions.
This relationship is important in understanding acid-base chemistry, where the strength of an acid is often discussed in relation to its conjugate base. The conjugate base can help neutralize acids and plays a significant role in buffer solutions, maintaining pH levels in various environments.