Question

Calculate the maximum standard voltage possible for a voltaic cell based on the following half reactions:

E°/V
Cl₂(g)+2e- →2Cl- (aq) +1.36
I₂(s)+2e- →2I- (aq) +0.54

a. +0.82 V
b. +1.90 V
c. -0.82 V
d. +0.95 V

Answer 1

To calculate the maximum standard voltage of a voltaic cell, combine the voltages of the oxidation and reduction half reactions. For the given half reactions, the maximum standard voltage is 0.82 V.The correct option is option a.

Step-by-step explanation:

To calculate the maximum standard voltage possible for a voltaic cell based on the given half reactions, we need to combine the voltages of the oxidation and reduction half reactions. The half reactions given are:

E°/VCl₂(g)+2e- →2Cl- (aq) +1.36

I₂(s)+2e- →2I- (aq) +0.54

To do this, we subtract the reduction potential of the anode reaction from the reduction potential of the cathode reaction. In this case, the anode reaction is the first half reaction and the cathode reaction is the second half reaction. So, the maximum standard voltage would be 1.36 V - 0.54 V = 0.82 V. Therefore, the correct answer is option a. +0.82 V.