Difference between dibasic acid and diprotic acid?

Answer 1

They both mean the same thing:

acid molecules with 2 protons: e.g. H2O and H2S and ....

H2S --> H+ + HS-

HS- --> H+ + S2-

The two sulfides (HS- and S2-) are both base, so H2S is dibasic (= forming two bases)

Two protons are freed, so H2S is diprotic (= forming two protons)

Answer 2

Dibasic acid is an acid that can donate two protons (H+) per molecule in a chemical reaction, while diprotic acid is an acid that can release two protons (H+) in solution. The key difference is that dibasic acid refers to the number of acidic groups in the molecule, while diprotic acid refers to the number of protons that can be donated.