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Line Notation

In a galvanic cell, the electrode that acts as a source of electrons to the solution is called the ___________; chemical change that occurs at this electrode is called_________. C athode, oxidation Anode, reduction Anode, oxidation Cathode, reduction. Line Notation.

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Line Notation

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  1. In a galvanic cell, the electrode that acts as a source of electrons to the solution is called the ___________; chemical change that occurs at this electrode is called_________. Cathode, oxidation Anode, reduction Anode, oxidation Cathode, reduction

  2. Line Notation • Solid│Aqueous││Aqueous │solid • Anode on the left ││Cathode on the right • Single line different phases • Double line porous disk or salt bridge • If all the substances on one side are aqueous, a platinum electrode is indicated

  3. For this reaction: • Cu(s) + Fe+3(aq) → Cu+2(aq) + Fe+2(aq)

  4. Under standard conditions, which of the following is the net reaction that occurs in the cell? • Cd│Cd2+││Cu2+│Cu a. Cu2+ + Cd→ Cu + Cd2+ b. Cu + Cd → Cu2+ + Cd2+ c. Cu2++ Cd 2+→ Cu + Cd d. Cu + Cd 2+ → Cd + Cu2+

  5. Galvanic Cell • The reaction always runs spontaneously in the direction that produced a positive cell potential. • Four things for a complete description 1)Cell Potential 2)Direction of flow 3)Designation of anode and cathode 4)Nature of all the components-electrodes and ions

  6. Practice • Completely describe the galvanic cell based on the following half-reactions under standard conditions. • MnO4-+ 8H++ Se- →Mn2+ + 4H2O E0=1.51V • Fe2++ 3e- → Fe(s) E0=.036V

  7. Potential, Work and ΔG • emf= potential

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