Winter 2007 Dr. Hale Quiz #1 1) Given the following ½ reactions: Ga + (aq) + e-Ga(s) ξ ° = -0.53 V Cl 2 (g) + 2e-Cl-(aq) ξ ° = +1.36 V If a Galvanic cell were made from the two ½ reactions above, what voltage would the cell possess? A) 2.43 V B) 0.30 V C) 1.89 V D) -0.83V E) 0.83V Pick the largest (keep it) Pick the smallest (flip it) Add ‘em up 2) Given the following ½ reactions: Ga + (aq) + e-Ga(s) ξ ° = -0.53 V Cl 2 (g) + 2e-Cl-(aq) ξ ° = +1.36 V Mg 2+ (aq) + 2e-Mg (s) ξ ° = -2.36 V From the ½ reactions above, place the following in increasing order of reducing strength: (weakest to strongest reducing agent) A) Ga < Cl-< Mg B) Ga < Cl-< Mg C) Mg < Ga < Cl-D) Cl-< Ga < Mg Reducing agents undergo oxidation. Most favorable oxidation ½ reaction is Mg
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