Question

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Define Borax bead test ?

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Answer 1

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BORAX BEAD TEST :-

Borax is first heated on Platinum wire where it dehydrate completely forming glass like beats consisting of NaBo2 and B2o3 is then mixed with salt to be tested and heated further where coloured metaborates are formed.


⏩Borax(Na2B4O7•10H2o)

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Answer 2

End of Platimum wire is heated where little powered borax is taken. It's heated again, Borax first swells and then melts into colourless, glasslike beads on the loop. Again, few grains of the substance are put on the beads, reheated first in the oxidizing flame and then in the reducing flame.

Chemistry:

Na2B4O7(arrows) 2NaBO2+B2O3

                                Glassy Mass