The product that is formed in the above given acid base reaction is the hydroxyl ions. And the equilibrium lies on the right of the reaction arrow.
An acid–base reaction is a type of chemical reaction that usually involves the exchange of one or more hydrogen ions, H+, between species that may be neutral (molecules, such as water, H2O) or electrically charged ones such as (ions, such as ammonium, NH4+; hydroxide, OH−; or carbonate, CO32−).
In the Bronsted-Lowry theory of acids and bases a strong base is a compound that is capable to deprotonate most other molecules that are containing an ionizable hydrogen as an acid. One of the most common strong bases are the group 1 alkali metal hydroxides such as NaOH.
From the above given equation we can say that the oxide anion is the conjugate base of the hydroxide ion, which itself is a strong base. Therefore the oxide anion is an even stronger base when compared to the hydroxide. It is such a strong ion that it will strongly remove protons from solvent water molecules in order to form hydroxide ions. This reaction is so favorable that it will go fully to completion on the product side.
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