* Arsenic(III) oxide (As₂O₃): This oxide is amphoteric. This means it can act as both an acid and a base depending on the reaction conditions.

* Acidic behavior: It reacts with bases to form arsenites (e.g., Na₃AsO₃).

* Basic behavior: It reacts with strong acids to form arsenious salts (e.g., AsCl₃).

* Arsenic(V) oxide (As₂O₅): This oxide is acidic. It reacts with water to form arsenic acid (H₃AsO₄).

So, the acidity or basicity of arsenic oxide depends on the specific oxide you are referring to.