How can I identify an Arrhenius acid?
Usually the formula of an Arrhenius acid begins with H.
You can find the definition of an Arrhenius acid at
Examples of Arrhenius acids are
Hydrochloric acid, HCl
Nitric acid, HNO₃
Sulfuric acid, H₂SO₄
Acetic acid, HC₂H₃O₂
These all have H as the first element in the formula.
Note: Acetic acid is a carboxylic acid. When you take organic chemistry, you will learn that carboxylic acids are usually written with the acidic H at the end. Thus, in organic chemistry, the formula for acetic acid is CH₃COOH.