Answer to Question #213675 in General Chemistry for amit

Question

A common reference electrode consists of a silver wire coated with AgCl(s) and immersed in 1 M KCl (pictured in Question 7).

AgCl (s) + e^- → Ag(s) + Cl^- (1 M)      E° = 0.2223 V

What is E_cell when this electrode is a cathode in combination with a standard zinc electrode as an anode?

Answer 1

Standard Zinc cathode = - 0.76V

E_cell = E_cathode - E_anode

= 0.22V - (- 0.76V)

= + 0.98V