Chemistry問題 - 甚麼是organic acid?

有機酸是指一些具有酸性的有機化合物。最常見的有機酸是羧酸，其酸性源於羧基 (-COOH)。磺酸 (-SO3H)等也屬於有機酸。
An organic acid is an organic compound with acidic properties. The most common organic acids are the carboxylic acids whose acidity is associated with their carboxyl group -COOH. Sulfonic acids, containing the group -SO2OH, are relatively stronger acids. The relative stability of the conjugate base of the acid determines its acidity. Other groups can also confer acidity, usually weakly: -OH, -SH, enol group, and the phenol group. In biological systems organic compounds containing only these groups are not generally referred to as organic acids.

A few common examples include:

Lactic acid
Acetic acid
Formic acid
Citric acid
Oxalic acid

The previous answer already covers most about organic acid but the most important difference between inorganic & organic is the % of ionization. Most inorganic acids are almost 100% ionization in water however organic acids are only slightly ionizing in water. This is why inorganic acid is much stronger than organic ones !