Question

What is the EMF of a galvanic cell if E°cathode = 0.80 volts and E°anode = -0.76 volts?

(a) 1.56 volts

(b) 0.04 volts

(c) -1.56 volts

(d) -0.04 volts

This question was addressed to me in quiz.

My doubt is from Electrochemistry in division Electrochemistry of Chemistry – Class 12

Answer 1

Correct option is (a) 1.56 volts

Easy explanation: Given,

E°cathode = 0.80 volts

E°anode = -0.76 volts

E°cell = E°cathode – E°anode

E°cell = 0.80 – (-0.76)

E°cell = 1.56 volts.