Sodium borate on reaction with H_2SO_4 (conc. | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) When borate is heated with ethanol and conc. $H_2SO_4$,triethyl borate is produced,and these vapours burn with a green-edged flame on ignition.$Na

Vedclass · Accepted Answer

$(C_2H_5)_3BO_3$

Vedclass · Answer

(D) When borate is heated with ethanol and conc. $H_2SO_4$,triethyl borate is produced,and these vapours burn with a green-edged flame on ignition.$Na_2B_4O_7 + H_2SO_4 + 5 H_2O \rightarrow Na_2SO_4 + 4 H_3BO_3$$H_3BO_3 + 3 C_2H_5OH \rightarrow B(OC_2H_5)_3 + 3 H_2O$Thus,the green-edged flame is due to the formation of Triethyl Borate,which is $(C_2H_5)_3BO_3$.

Sodium borate on reaction with $H_2SO_4$ (conc.) and $C_2H_5OH$ gives a compound '$A$' which burns with a green flame. The compound '$A$' is

Similar Questions

Give the chemical reaction of aluminum with dilute $HCl$.

In the reaction $B_2O_3 + C + Cl_2 \to A + CO$,the $A$ is:

When borax is heated with $CoO$ on a platinum loop,the blue coloured bead formed is largely due to

In diborane $(B_2H_6)$,the two $H-B-H$ bond angles are nearly

Aluminium reacts with dilute $HCl$ and liberates a gas '$A$' and with aqueous alkali liberates a gas '$B$'. $A$ and $B$ respectively are

Vedclass Test Series

Exam Paper Generator

Online Exam Module