First slide

Borax

Question

Borax is prepared by treating colemanite with

Moderate

A

${Na}_{2} {CO}_{3}$
B

NaCl
C

${NaNO}_{3}$
D

${NaHCO}_{3}$

Solution

${Ca}_{2} B_{6} O_{11} + 2 {Na}_{2} {CO}_{3} \to 2 {CaCO}_{3} ↓ + {Na}_{2} B_{4} O_{7} + 2 {NaBO}_{2}$

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