Cliffs AP Chemistry, 3rd Edition

(singke) #1


  • At equilibrium: Q= K; Ecell= 0
    ln.
    nE
    K 0 0257cell
    :




%



  • OIL RIG: Oxidation Is Losing; Reduction Is Gaining (electrons)

  • AN OX (ANode is where OXidation occurs)
    RED CAT (REDuction occurs at the CAThode)

  • Electrolytic cell — electrical energy is used to bring about a nonspontaneous electrical
    change. Anode is (+) electrode; cathode is (−) electrode.

  • Voltaic (chemical) cell — electrical energy is produced by a spontaneous redox reaction.
    Anode is (−) terminal; cathode is (+) terminal.

  • Relation Between ∆G, K, and E°cell


∆GKE°cell Reaction Under Standard State Conditions
− >1 + Spontaneous
0 =1 0 Equilibrium
+<1− Nonspontaneous; spontaneous in reverse direction

Part II: Specific Topics

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