y is magnesium hydroxide is a wekr base than NAOH
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The basic property of a compound depends how easily it releases OH- ions. The smaller sized cation and having high positive charge on it makes more % covalent character of bond with OH. This causes difficulty in breaking bond between Metal and OH resulting lesser basic nature.
In Mg(HO)2 and NaOH, size of Mg2+ is smaller than Na+ so Mg-OH bond is stronger than Na-OH bond. Hence release of OH- is easy from NaOH. Hence, NaOH is stronger base than Mg(HO)2
In Mg(HO)2 and NaOH, size of Mg2+ is smaller than Na+ so Mg-OH bond is stronger than Na-OH bond. Hence release of OH- is easy from NaOH. Hence, NaOH is stronger base than Mg(HO)2
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