B( OH )3+ NaOH leftharpoons NaBO 2+ Na [ B ( OH )4]+ H 2 O How can this reaction be made to proceed in forward direction?

Question

B( OH )3+ NaOH leftharpoons NaBO 2+ Na [ B ( OH )4]+ H 2 O How can this reaction be made to proceed in forward direction? (A) addition of cis-1,2-diol. (B) addition of borax. (C) addition of trans-1,2-diol. (D) addition of Na 2 HPO 4.

Tardigrade Admin · Accepted Answer

The given reaction is a reversible reaction. The sodium metaborate formed gets hydrolysed to regenerate boron trihydroxide and

N a O H

.

B (O H)_{3} + N a O H ⇌ N a B O_{2} + N a [B (O H)_{4}] + H_{2} O

In the presence of polyhydroxy compounds such as cis-

1, 2

-diol or glycerol, boron trihydroxide forms chelated complex (ring-structure) of higher stability. So on addition of cis-

1, 2

- diol, due to the formation of this stable complex, the reaction proceeds in the forward direction.

Q. $B (O H)_{3} + N a O H ⇌ N a B O_{2} + N a [B (O H)_{4}] + H_{2} O$
How can this reaction be made to proceed in forward direction?

addition of cis- $1, 2$ -diol.

addition of borax.

addition of trans- $1, 2$ -diol.

addition of $N a_{2} H P O_{4}$ .

Q. B(OH)3​+NaOH⇌NaBO2​+Na[B(OH)4​]+H2​O How can this reaction be made to proceed in forward direction?

addition of cis-1,2-diol.

addition of borax.

addition of trans-1,2-diol.

addition of Na2​HPO4​.

Q. $B (O H)_{3} + N a O H ⇌ N a B O_{2} + N a [B (O H)_{4}] + H_{2} O$
How can this reaction be made to proceed in forward direction?

addition of cis- $1, 2$ -diol.

addition of trans- $1, 2$ -diol.

addition of $N a_{2} H P O_{4}$ .