Examine the reaction and electrochemical data below to answer the following ques

Question

Examine the reaction and electrochemical data below to answer the following questions. The two following reactions are to be used to build a galvanic cell with the highest cell potential. Equation 1 : MnO4(-) + 8H(+) +5e -> Mn(2+) + 4H2O
Eo = 1.51 V
Equation 2: Fe(2+) + 2e -> Fe
Eo = -0.45 V

The reaction that is best suited to be the cathode half-reaction in the galvanic cell is shown by equation

(a digit), because it is presented as a(n)

(a 9-letter word with letter "u" inside) reaction and its

(a number) V E0 shows that it is

(a 11-letter word starting with letter "s").

Explanation / Answer

The best suited to be the cathode half-reaction in the galvanic cell :

MnO4(-) + 8H(+) +5e -> Mn(2+) + 4H2O ; Eo = 1.51 V

E0cell = E0cathode - E0anode = 1.51 - ( -0.45) = 1.96 V

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