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Question 991
What is the oxidation state of chromium in chromite ore (FeCr2O4)?
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Question 992
What is the oxidation state of manganese in Mn2O7?
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Question 993
What is the oxidation state of chromium in potassium dichromate (K2Cr2O7)?
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Question 994
Which ion is in equilibrium with the dichromate ion (Cr2O7 2–) in aqueous solution?
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Question 995
What is the formula of the orange crystalline compound obtained after acidifying the sodium chromate solution?