Metal and non-metal oxides and water reaction?

[ASidd]

Homework Statement

I understand how metallic oxide dissolve in water to produce OH- ion due to high electronegativity of oxygen. But I am having trouble understanding how non-metallic oxide dissolve in water to form acid?
For Homework I have to explain the reaction of Sulfur trioxide in water and how that produces H+ and sulfate ions.But I have no idea how to go on about this

Homework Equations

The Attempt at a Solution

SO3 + H2O=> H2SO4
and H2SO4=> H+ +HSO4-
HSO4-=>H+ +SO4-

I have no idea if these are correct or not? Also what makes the H2SO4 in the first reaction disassociate to ions?

 

[Borek]

First and second equations are OK, the last one is not (charge is not balanced).

 

[ASidd]

So h+ so4-==> h+ + so4-2?

 

[ASidd]

I was also wondering when sulfur trioxide dissolves in water why does only one of the oxygen atoms in sulfur trioxide attaches to a hydrogen atom? why not the other 2

 

[Borek]

So h+ so4-==> h+ + so4-2?

Can't say it is much better. Please pay attention to how you format these things - some letters have to be capitalized, some characters should be made subscripts/supperscripts and so on.

If you don't know how - [noparse]H₃O⁺[/noparse] is displayed as H₃O⁺.

H₂SO₄ is most stable for energetic reasons. Both HSO₄^- and H₃SO₄⁺ exist, although the latter is observed only in pure sulfuric acid, never in water solutions.

 

[ASidd]

Okay thanks. Also do all non-metallic oxides have to be polar molecules in order to form an acid within water?

 

[Borek]

I wouldn't call CO₂ polar.