Inorganic reactions

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Could you please tell me what type of reaction is involved in the equation below?
O^2- + H₂O -> 2OH^-
I have no idea, so any help would be great.

Igloo writes
 
This is an acid-base, or “proton-transfer” type of reaction.
The oxide ion, O^2- (the Bronsted-Lowry base) removes a proton from the water molecule (the Bronsted-Lowry acid) and turns into a hydroxide ion:
O^2- + H⁺ -> OH^-
and the water molecule, since it loses a proton , also turns into a hydroxide ion:
H₂O - H⁺ -> OH-
 

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updated: 24 January 2006