Question

What is the EMF of a galvanic cell if the standard oxidation potential of the oxidation half-reaction is 0.64 volts and the standard reduction potential of the reduction half-reaction is 0.48 volts?

(a) 1.48 volts

(b) 1.12 volts

(c) 1.36 volts

(d) 0.96 volts

I had been asked this question in examination.

This key question is from Electrochemistry topic in chapter Electrochemistry of Chemistry – Class 12

Answer 1

Correct choice is (b) 1.12 volts

The best explanation: Given,

Standard oxidation potential of the oxidation half reaction = 0.64 volts

Standard reduction potential of the reduction half reaction = 0.48 volts

Standard EMF of the cell = [Standard oxidation potential of the oxidation half reaction] + [Standard reduction potential of the reduction half reaction]

                                             = 0.64 + 0.48

                                             = 1.12 volts.