Question

Is Na+ an acid or a base?

Answer 1

The large sodium ion, `Na^+`, is neither an acid nor a base in water.

Explanation:

The sodium has a fairly large charge to size ratio. It does not function effectively as a base. If sodium salts do have an effect on solution `pH`, it is because of the action of the gegenion, `CO_3^(2-). OH^-, F^-`, whatever.