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in Chemistry by (53.2k points)

Write the balanced equations involved in the preparation of potassium dichromate (K2Cr2O7) from chromite ore.

1 Answer

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Best answer

4FeCr2O4 + 8Na2CO3 + 7O2 → 8Na2CrO4 + 2Fe2O4 + 2Fe2O3 + 8CO2 

OR 

2Na2CrO4 + 2H+ → Na2Cr2O7 + 2Na+ + H2

2Na2CrO4 + H2SO4 → Na2Cr2O7 + Na2SO4 + H2

Na2Cr2O7 + 2KCl → K2Cr2O7 + 2NaCl.

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