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p-Block Elements - I
normal
$B{\left( {OH} \right)_3} + NaOH \to NaB{O_2} + Na\left[ {B{{\left( {OH} \right)}_4}} \right] + {H_2}O$
How can this reaction is made to proceed in forward direction?
A
addition of cis, $2$ diol
B
addition of borax
C
addition of trans $1,\, 2$ diol
D
addition of $Na_2HPO_4$
Solution
$H_3BO_3$ acts are weak monobasic Lewis acid.
$(i)$ $B(OH)_3 + NaOH \to Na [B(OH)_4]$ On addition of cis $1, 2$ diol in $H_3BO_3$ solution, acidic strength of $H_3BO_3$ increases due to chelation effect.
Standard 11
Chemistry
