Here's why:

* Structure: Ethanol (CH3CH2OH) has a hydroxyl group (-OH) attached to a carbon chain. The hydrogen atom in the hydroxyl group is *slightly* acidic, but it's not nearly as acidic as the hydrogen atoms in carboxylic acids or mineral acids.

* pKa: The pKa of ethanol is around 15.9. A lower pKa value indicates a stronger acid. For comparison, water has a pKa of 15.7.

* Reaction with water: Ethanol can react with water to a very small extent, forming the ethoxide ion (CH3CH2O-) and a hydronium ion (H3O+). However, this reaction is very limited, and ethanol is not considered a strong base.

In summary: Ethanol is a very weak acid and very weak base, making it essentially neutral in terms of acidity.