Explain effect of heating on Borax Share with your friends Share 0 Vartika Jain answered this Dear Student, On heating, borax loses its water of crystallisation and swells up to form a puffy mass. On further heating, it melts into a clear liquid which solidifies to form a transparent glass like bead, called bprax bead, which comprises of sodium metaborate and boric anhydride. Na2B4O7.10H2O →∆ Na2B4O7 + 10H2O Na2B4O7 →∆ 2NaBO2 + B2O3 -1 View Full Answer Shashi answered this Borax on heating, initially swells up by the elimination of water molecules and on further heating at high temperature, a glassy transparent solid mass appears known as sodium metaborate. The reaction is shown as: Na2B4O7.10H2O --heat--> Na2B4O7 (anhydrous form) -- heat/ 7400C--> 2NaBO2 + B2O3 (sodium metaborate) 0 Sumit Yadav answered this check your ans 1