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| 1. |
Write the steps involved in the preparation of K2Cr2O7 from chromite ore |
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Answer» (i) It takes place in three steps: Conversion of chromite ore into sodium chromate 4FeCr2O4 + 4Na2CO3 + 7O2 → Na2CrO4 + Fe2O3 + 8CO2 Conversion of sodium chromate into sodium dichromate 2Na2CrO4 + 2H+ → Na2Cr2O7 + 2Na+ + H2O Conversion of sodium dichromate into potassium dichromate Na2Cr2O7 + 2KCl → K2 Cr2O7 + 2NaCl |
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