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AP® Chemistry

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Moderate

Cell Potential Facts

APCHEM-OIGYE9

Which of the following is NOT true about redox reactions and electrochemical cells?

A

The purpose of the wire connecting the anode and cathode in an electrochemical cell is for electrons to flow through.

B

The porous barrier between the two liquid chambers in an electrochemical cell is present so that a limited number of ions can pass through and is necessary for an electric current to flow through the cell.

C

The positive and negative signs given to the electrodes represent electric charges on each electrode.

D

It is not always necessary to have a solid rod of an element being oxidized or reduced present in each chamber of an electrochemical cell. An unreactive substitute such as platinum can be used instead.