How can the following reaction be made to proceed in forward direction ?
`B(OH)_(3) + NaOH hArr Na[B(OH)_(4)]`.

Options

A. By the addition of `cis-1,2-diol`.
B. By the addition of borax.
C. By the addition of `trans-1,2-diol`
D. By the addition of `Na_(2)HPO_(4)`.

Answer

A

Explanation

`B(OH)_(3) + NaOH hArr NaBO_(2) + Na^(oplus) [B(OH)_(4)]^(Ө) + H_(2)O`
This reaction is reversible due to the hydrolysis of sodium metaborate `(NaBO_(2))`.
In the presence of complexing agents such as `cis-1,2-diol`, catechol, glycerol, etc. a complex is formed, and it prevents hydrolysis from taking the reaction in the forward direction.
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