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Write the equations involved in the preparation of Potassium Dichromate from Chromite ore.

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Write the equations involved in the preparation of Potassium Dichromate from Chromite ore.

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(i) 4FeCr2O4 + 8Na2CO3 + 7O2 → 8Na2CrO4 + 2Fe2O3 + 8CO2 

(ii) 2Na2CrO4 + 2H+ → Na2Cr2O7 + 2Na+ + H2O 

(iii) Na2Cr2O7 + 2KCl → K2Cr2O7 + 2NaCl

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