Ch1b09Lecture16

Ch1b09Lecture16 - Very brief electrochemistry G and...

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Very brief electrochemistry, G and equilibrium Expanded Chemistry in Context No lecture on Monday
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Cu 2+ (aq) + Zn Cu(s) + Zn 2+ The salt bridge conducts ions between both chambers to maintain electrical neutrality. Note reading of voltmeter: 1.10 V Fig. ElCh.2. A laboratory version of a Daniell Cell Electrochemical Cells, G o , and equilibrium
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Electrochemistry • Electrolytic cells are those in which electrical energy from an external source causes nonspontaneous chemical reactions to occur. • Voltaic cells are those in which spontaneous chemical reactions produce electricity and supply it to an external circuit. Electrodes • Electrodes are surfaces upon which oxidation and reduction half– reactions occur. • The cathode is the electrode at which reduction occurs. • The anode is the electrode at which oxidation occurs. Electrochemical Cells
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Power Supply - + Daniell Galvanic Cell - Laboratory Version Cu 2+ (aq) + Zn Cu(s) + Zn 2+ Suppose we attach a power supply that opposes the current flow.
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