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Write the balanced chemical equation inv...

Write the balanced chemical equation involved in the manufacture of potassium- dichromate from chromite ore.

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`4Fe Cr_2 O_4 + 8Na_2 CO_3 + 7O_2 to 8Na_2 CrO_4 + 2Fe_2 O_3 + 8CO_2`
`2Na_2 CrO_4 + 2H^+ to Na_2 Cr_2 O_7 + H_2 O + 2Na^+`
`Na_2 Cr_2 O_7 + 2KCI to K_2 Cr_2 O_7 + 2NaCI`
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