Question: Goethite (FeOOH) can precipitate from solution when iron is oxidized from Fe2+ to Fe3+. In goethite, the iron is in sixfold coordination. Assume that Fe

Goethite (FeOOH) can precipitate from solution when iron is oxidized from Fe2+ to Fe3+. In goethite, the iron is in sixfold coordination. Assume that Fe is in the low spin state. Which of the following elements-Sc, Cr, V, Co, Ni, As, and Sb-might enter the crystal structure of goethite when it precipitates from solution? If an element can exist in more than one oxidation state, answer the question for each oxidation state. Explain your answer.

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