When NaBH_4 is dissolved in water, | vedclass

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(A) Sodium borohydride $(NaBH_4)$ is soluble in water,but it is unstable in the presence of water.When $NaBH_4$ is dissolved in water,it undergoes hyd

Vedclass · Accepted Answer

It decomposes with the evolution of $H_2$

Vedclass · Answer

(A) Sodium borohydride $(NaBH_4)$ is soluble in water,but it is unstable in the presence of water.When $NaBH_4$ is dissolved in water,it undergoes hydrolysis to produce sodium hydroxide $(NaOH)$,boric acid or borates,and hydrogen gas $(H_2)$: $NaBH_4 + 2H_2O \rightarrow NaBO_2 + 4H_2$.However,in basic conditions,the reaction is slower. The formation of $OH^{-}$ ions (from $NaOH$) makes the solution alkaline,which helps in stabilizing the remaining $BH_4^-$ ions and prevents further rapid decomposition.

When $NaBH_4$ is dissolved in water,

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