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Consider the electrolytic procedure for purifying copper. Suppose that a sample of copper contains the following impurities Fe, Ag, Zn, Au, Co, Pt, and Pb
Which of the following changes occur during this process?

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Ag, Pt, and Au are unaffected and simply form the sludge that accumulates at the bottom

All these metals form as anode mud

Ag, Pt and Au are recovered from anode mud

Fe, Zn, Co and Pb are oxidized and dissolved in electrolyte

answer is A, B, D.

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Detailed Solution

Ag, Au and Pt are noble metals, remain unaffected during electrolytic refining of copper and comes into anode mud. Fe, Zn, Co and Pb are oxidized and dissolve in electrolyte Ag, Au and Pt can be recovered from anode mud.

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