Question

What happens when Borax (Na2 B4O7 .10H2O) is treated with Conc. H2 SO4 Give Chemi- cal reaction.​

Answer 1

hii here's your answer

Borax is the salt resulting from neutralisation of boric acid with sodium hydroxide so addition of an acid just reverts the salt back to boric acid.

Na2B4O7 + H2SO4 + 5H2O = 4H3BO3 + Na2SO4

Hope it helps :)

Answer 2

The chemical reaction of borax with concentrated sulphuric acid is as follows:

Na₂B₄O₇.10H₂O + (conc.) H₂SO₄ → 4H₃BO₃ + Na₂SO₄ + 5H₂O

• Borax is the salt formed by neutralizing boric acid with sodium hydroxide, therefore adding acid just converts the salt back to boric acid.
• Boric acid is generated by adding a determined amount of concentrated sulphuric acid to a heated concentrated solution of borax.
• When borax is heated with ethyl alcohol and strong sulfuric acid, vapors of triethyl borates are formed. When these vapors are ignited, they produce a green-edged flame.