Which of the following hydroxides is most basic-(A) 2Be(OH) (B) 2Ba(OH)(C) 2Ca(OH) (D) 2Mg(OH
Question
Which of the following hydroxides is most basic-(A) 2Be(OH) (B) 2Ba(OH)(C) 2Ca(OH) (D) 2Mg(OH
Solution
The basicity of a hydroxide is determined by the ease with which it can donate a hydroxide ion (OH-). This is generally easier for elements lower down the periodic table as they have larger atomic radii and lower ionization energies.
Comparing the elements given in the options, Be (Beryllium) and Mg (Magnesium) are in the second period of the periodic table, while Ca (Calcium) and Ba (Barium) are in the fourth and sixth periods respectively.
Therefore, Ba(OH)2 (option B) is the most basic hydroxide among the given options as Barium is the element located furthest down the periodic table.
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