Question

total number of molecules of HCl react with 1 mole of borax to convert all borons into boric acid​

Answer 1

Q -> total number of molecules of HCl react with 1 mole of borax to convert all borons into boric acid.

solution : chemical formula of borax is $Na_2B_4O_7$

chemical formula of Boric acid is $H_3BO_3$

here reaction between borax and hydrochloride is given below..

$Na_2B_4O_7+2H_2O\rightarrow H_2B_4O_7+2NaCl$

after hydrolysis : $H_2B_4O_7+5H_2O\rightarrow 4H_3BO_3$

here it is clear that when 1 mole of borax is treated with 2 moles of hydrochloride we get $H_2B_4O_7$. after hydrolysis of it, we get 4 moles of boric acid.

Therefore two moles of hydrochloride is used to converts all borons into boric acid of 1 mole of borax.

Answer 2

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