2Na2CrO4 + 2 H
+ ® Na2Cr2O7 + 2 Na
+ + H2O
Rationalised 2023-24
106
Chemistry
Sodium dichromate is more soluble than potassium dichromate The latter is therefore, prepared by treating the solution of sodium
dichromate with potassium chloride Na2Cr2O7 + 2 KCl ® K2Cr2O7 + 2 NaCl
Orange crystals of potassium dichromate crystallise out The
chromates and dichromates are interconvertible in aqueous solution
depending upon pH of the solution