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.

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Presentation transcript:

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

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

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

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+

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

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

Potential, Work and ΔG emf= potential