Is oxalic acid a monoprotic acid? Explain.

Oxalic acid is a monoprotic acid because it has no hydrogen atoms.

Oxalic acid is a monoprotic acid because it has one ionizable hydrogen atoms.

Oxalic acid is not a monoprotic acid because it has two ionizable hydrogen atoms.

Oxalic acid is not a monoprotic acid because it has three ionizable hydrogen atoms.

None of the above