Question

The reaction,

$B(OH{)}_3+NaOH\to Na[B\left(OH{)}_4\right]$ can be made to proceed in forward direction by :

• A. adding cis-1, 2-diol.
• B. adding borax.
• C. adding trans-1, 2-diol.
• D. adding $N{a}_{2}HP{O}_4$.

Answer 1

Answer: (A)

adding cis-1, 2-diol.

If polyhydroxy compound like glycerol, mannitol or sugar are added to titration mixture than it can be titrated with $NaOH$.

Due to formation of chelated complex, the reaction moves in forward direction.

$B(OH{)}_3+NaOH\to Na[B\left(OH{)}_4\right]$