First slide
Borax
Question

Statement I : Boric acid burnt with ethyl alcohol in green edged flame.
Statement II : Boric acid when burnt with ethyl alcohol it forms tri ethyl orthoborate.

Easy
Solution

                                               OR

\mathop {B{{(OH)}_3}}\limits_{Ortho\,boric\,\,acid} + \mathop {3{C_2}{H_5}OH}\limits_{Ethyl\,\,alcohol} \xrightarrow{{Conc.{H_2}S{O_4}}}\mathop {B{{(O{C_2}{H_5})}_3}}\limits_{Triethyl\,\,\,borate}

When ortho boric acid is burnt with ethyl alcohol in presence of Conc H2SO4 gives triethyl ortho borate.

When the vapours of triethyl borate ignited burn with a green edged flame.The green edged flame is due to the combustion of ethyl borate.

This test is used to detect the borates and boric acid in qualitative analysis.

 

 

 

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