Which is not true about borax? — p Block Elements Chemistry Question

💡 Solution & Explanation

(b) In borax (Na2B4O7.10H2O), among 10 water molecules 2 molecules are part of structure, i.e., exists Na2[B4O5(OH)4].8H2O.<br>[SEE DIAGRAM]<br>Na2[B4O5(OH)4].8H2O + 2HCl $\rightarrow$ 2NaCl + 4H3BO3 + 5H2O<br>Methyl orange (pH = 3.7) is used to detect end point. Aq. solution of borax acts as buffer, as borax is salt of strong base NaOH and weak acid H3BO3.