What functional groups can act as acids?
The sulfonic, phosphoric, and carboxylic acid groups are the strongest acids. Many functional groups behave as weaker acids.
A functional group is an acid if it can donate a proton to a base.
Here is a list of functional groups that can behave as acids, along with their approximate
R-SO₃H — sulfonic acids —
R-PO₄H₂ — phosphoric acids —
R-COOH — carboxylic acids —
R-SH — Thiols —
R-OH — Alcohols —
R-NH₂ — Amines —
C-H bonds can also behave as acids. Their