Question

what happens when borax is heated strongly?​

Answer 1

• First borax loses water
• Then it forms borax glass

$\\ \rm\rightarrowtail Na_2B_4H_7.10H_2O\overset{\Delta}{\longrightarrow} Na_2B_4H_7+10H_2O$

• It's very swelling

$\\ \rm\rightarrowtail Na_2B_4O_7\overset{\Delta}{\longrightarrow} NaBO_2+B_2O_3$