Question

Question #7c802

Answer 1

Oxides that form neither an acid nor a base, in combination with water.

Explanation:

Acid oxides will react with water to ultimately give off `H^+`:
Sulphur trioxide `SO_3` will form sulfuric acid:
`SO_3 (g) + H_2O (l)->H_2SO_4` which will give off `H^+`

Basic oxides will accept `H^+`:
Calcium oxide `CaO` will form a base:
`CaO (s)+H_2O(l)->Ca(OH)_2`
The `OH^-` part combining with `H^+` to form water.
Ferrous oxide `FeO` will not combine with water, but it will accept `H^+` from an acid:
`FeO+2H^+ ->Fe^(2+)+H_2O`

Neutral oxides do neither. Examples are carbon monoxide (`CO`), nitrogen monoxide (`NO`), and of course water (`H_2O`)