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why does orthoboric acid (H3BO3) becomes more strong during titration of NaOH when organic compounds such as glcerol is added ?

6 years ago


Answers : (1)


Dear student,

Boric acid is soluble in boiling water. When heated above 170 °C, it dehydrates, forming metaboric acid (HBO2):

H3BO3 → HBO2 + H2O

Metaboric acid is a white, cubic crystalline solid and is only slightly soluble in water. Boric acid melts at about 236 °C, and when heated above about 300 °C further dehydrates, forming tetraboric acid or pyroboric acid (H2B4O7):

4 HBO2 → H2B4O7 + H2O

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