# Give the test that is used to detect borate radicals is qualitative analysis. - Chemistry

Short Note

Give the test that is used to detect borate radicals is qualitative analysis.

#### Solution

1. Borax when heated with ethyl alcohol and concentrated H2SO4, produces volatile vapours of triethyl borate, which burns with green edged flame.
a. $\ce{\underset{\text{Borax}}{Na2B4O7} + \underset{\text{(conc.)}}{H2SO4} + 5H2O->[\Delta]\underset{\text{Sodium sulphate}}{Na2SO4} + \underset{\text{Orthoboric acid}}{4H3BO3}}$
b. $\ce{\underset{\text{Orthoboric acid}}{H3BO3} + \underset{\text{Ethyl alcohol}}{3C2H5OH}->\underset{\text{Triethyl borate}}{B(OC2H5)3} + 3H2O}$
2. The above reaction is used as a test for the detection and removal of borate radical $\ce{(BO^3-_3)}$ in qualitative analysis.
Concept: Chemistry of Notable Compounds of Elements of Groups 13, 14 and 15
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#### APPEARS IN

Balbharati Chemistry 11th Standard Maharashtra State Board
Chapter 9 Elements of Group 13, 14 and 15
Exercises | Q 11 | Page 134
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