[johntdlemon]

I know it produces salt. But what exactly happens?
Since acid oxides can't give H⁺, I'm wondering if it's a Lewis acid-base reaction?
Although I really can't understand how they become salt.
Thanks.

[Hunter2]

It will act as an addition. Example CaO + CO₂ => CaCO₃

The Carbon will affine to the Oxygen of the calciumoxide. Oxygen has negative charges and the Carbon positive ones.

[johntdlemon]

Thanks!
So calcium donates two electrons to carbon, therefore it's a Lewis acid-base reaction?

[Hunter2]

I dont think it will donate electrons to carbon. They are donated to oxygen.

[confusedstud]

I dont think it will donate electrons to carbon. They are donated to oxygen.

But aren't all the oxidation states the same?

CaO+CO2->CaCO3
+2-2 +4-2  +2+4-2

so there aren't any electron transfer here?

[Hunter2]

It has nothing to do with oxydation states.

The charge of the carbon is positive. The one of the Oxygen is negative. So it will attract to it in the calciumoxide.

[confusedstud]

But are there any electron transfer going on in that reaction? And what do you mean by "The charge of the carbon is positive. The one of the Oxygen is negative. So it will attract to it in the calciumoxide."?

Thanks

[johntdlemon]

I dont think it will donate electrons to carbon. They are donated to oxygen.

Okay...I think I don't really understand the difference between a Lewis acid-base reaction a redox reaction.
Just saw this video, cleared things up a little bit.http://youtu.be/u2Bd_U8YoO8
Still don't fully understand though...
Please explain. Thanks a lot!