Separate half-cells contain and

CHEMISTRY · Multi-part · A Level · Chemistry · Electrode potentials · Electrode potentials

Problem

Separate half-cells contain

1.0\,\text{M}

Fe^{3+}/Fe^{2+}

and

1.0\,\text{M}

Sn^{4+}/Sn^{2+}

, each in contact with a platinum electrode. A variable-voltage power supply is adjusted so that current forces

Sn^{2+}

to be oxidized to

Sn^{4+}

while

Fe^{3+}

is reduced to

Fe^{2+}

. (a) Which platinum electrode acts as the anode? (b) What is the direction of electron flow in the external conductor (from which half-cell to which)?

Related theory

Electrode Potential
Galvanic Cells
Electrochemistry
Electrochemical Cells

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