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It is prepared by roasting powdered chromite with potash and limestone, treating the cinder with a hot potassium sulfate solution and leaching.

Alternatively, it may be prepared by the reaction of potassium dichromate and potassium hydroxide.

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12y ago

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What is difference between K2Cr2O7 and K2Cr2O4?

K2Cr2O7 is potassium dichromate, while K2Cr2O4 is potassium chromate. K2Cr2O7 is an orange-red compound used as an oxidizing agent, while K2Cr2O4 is a yellow compound. K2Cr2O7 tends to be more powerful as an oxidizing agent compared to K2Cr2O4.


What is the oxidation number of Cr in K2Cr2O4?

The oxidation number of Cr in K2Cr2O4 is +6. This is because each oxygen atom contributes an oxidation number of -2, and each potassium atom contributes an oxidation number of +1, resulting in a total charge of 0 for the compound.


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