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Unformatted text preview: |Zn2+(aq)||Cu2+(aq)|Cu(s) PracGce wriGng cell reacGons • Write the diagram for a cell with a hydrogen electrode on the leh and an iron(III)‐iron(II) electrode on the right. The two electrode compartments are connected by a salt bridge. PracGce wriGng cell reacGons, cont. • Write the diagram for a cell that has an electrode consisGng of a manganese wire dipping into a soluGon of manganese (II) ions on the leh, a salt bridge, and a copper(II)‐copper(I) electrode on the right with a plaGnum wire. Energy from Electron Transfer Why do baleries look so diﬀerent? Unit 6 Week 2 Lecture 4 Transferring chemical potenGal to electrical energy with creaGve design yields diﬀerent galvanic cells for diﬀerent applicaGons Diagram of “dry” cell, similar to Ever‐ready balery or Duracell Lead‐Acid balery • 6 cells 2 volts each, total 12 volts • Pb(s) + PbO2(s) + H2SO4 2PbSO4(s) + 2H2O(l) Hybrid Cars use NiMH baleries Toyota Prius Gas Engine and Electric Motor Energy from Electron Transfer What is a fuel cell? Unit 6 Week 2 Lecture 5‐Part 1 Fuel Cells • Galvanic cell that produces electricity by converGng chemical energy of a fuel without burning the fuel. SomeGmes called “ﬂow”baleries. • Most common fuel is hydrogen. Hydrogen Fuel Cell an...
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- Spring '08