Electron-Transfer Reactions Cu 2+ (aq) + Zn(s)  Cu(s) + Zn 2+ (aq)

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Presentation transcript:

Electron-Transfer Reactions Cu 2+ (aq) + Zn(s)  Cu(s) + Zn 2+ (aq)

Half-Reactions:

Direct vs. Indirect Electron-Transfer Reactions

Electrochemical Cells Cu 2+ (aq) + Zn(s)  Cu(s) + Zn 2+ (aq)

Standard Cell Potentials: Voltages

Eocell = E o cathode - E o anode

Why are some things good oxidants or reductants?

V are J/C

An electrolytic cell is used to generate 2.4 L of H 2 gas from water at a pressure of 1 atm and 290 K, running at a voltage of +2.6 V and 14 Amps. How long does it take?