The Final Step of the Purification of Copper Involves Electrorefining

question 10

Multiple Choice

The final step of the purification of copper involves electrorefining in which copper is separated from nickel and iron by being reduced at the cathode of a cell. Why are nickel and iron not reduced?

• A)Their reduction potentials are more positive than copper's.
• B)Their reduction potentials are more negative than copper's.
• C)They cannot be deposited on a copper electrode.
• D)Their reduction potentials are more negative than water's.
• E)Their reduction requires large overvoltages.

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Definitions:

Cell Cycle

A series of phases in the life of a cell, encompassing its growth, DNA replication, and division into two daughter cells.

DNA Synthesis

The process by which a cell's DNA is copied, involving the unwinding of the double helix, nucleotide matching, and the joining of new nucleotides.

Prokaryotes

Microorganisms characterized by the absence of a nucleus and other membrane-bound organelles, broadly classified into bacteria and archaea.

Eukaryotes

Organisms with cells that contain a nucleus enclosed within membranes.