Question
What happens when.
Borax is heated strongly.
Borax is heated strongly.
✓
Answer
When heated, borax undergoes various transitions. It first loses water molecules and swells. Then, it turns into a transparent liquid, solidifying to form a glass-like material called borax bead.
$\text{Na}_2\text{B}_4\text{O}_7.10\text{H}_2\text{O} \ \ \ \ \xrightarrow{\Delta} \ \ \ \ \text{Na}_2\text{B}_4\text{O}_7 \ \ \ \ \xrightarrow{\Delta} \ \ \ \ 2\text{NaBO}_2+\text{B}_2\text{O}_3 \\ \ \ \ \ \ \ \ \ \text{Borax}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{Sodium} \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{Boric} \\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{metaborate} \ \ \ \ \ \ \ \ \ \ \ \text{anhydride}$
$\text{Na}_2\text{B}_4\text{O}_7.10\text{H}_2\text{O} \ \ \ \ \xrightarrow{\Delta} \ \ \ \ \text{Na}_2\text{B}_4\text{O}_7 \ \ \ \ \xrightarrow{\Delta} \ \ \ \ 2\text{NaBO}_2+\text{B}_2\text{O}_3 \\ \ \ \ \ \ \ \ \ \text{Borax}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{Sodium} \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{Boric} \\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{metaborate} \ \ \ \ \ \ \ \ \ \ \ \text{anhydride}$
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