Question

give a preparation of orthoboric acid.

Answer 1

AnSwEr:—

$\sf{H_{3}BO_{3}}$ is the formula of orthoboric acid. It is a white crystalline solid with soapy touch. It a sparingly soluble in water but highly soluble in hot water.

$\longrightarrow$ It can be prepared by acidifying an aqueous solution of borax.

$\sf{Na_{2}B_{4}O_{7}+2HCl+5H_{2}O\longrightarrow\:2NaCl+4H_{3}BO_{3}}$

$\longrightarrow$ It is also formed by the hydrolysis of most boron compounds (halides, hydrides,etc).