Question

Using the two cell reduction potentials shown for their corresponding reaction, calculate the cell potential for a voltaic cell made from these two systems. Question 16 options: A) 1.68 V B) –1.68 V C) –0.78 V D) 0.78 V

Answer 1

Answer:

The right alternative is Option D (0.78 V).

Explanation:

According to the question,

The cell potential will be:

= $E^0_{Cr_2 O_7/er^{3+}}- E^0_{Fe^{2+}/Fe}$

By putting the values, we get

= $1.23-0.45$

= $0.78 \ V$

Thus the above is the correct option.