All of the following are true for the measurement of standard reduction potentials,except:
I standard conditions for reduction potentials is 25 ^oC and A = 1 for all aqueous and gaseous species.
II reduction potentials are measured relative to the standard hydrogen electrode (S.H.E. ) .
III standard reduction potentials are measured while connected to the negative electrode of the potentiometer.
IV the E^° for the S.H.E.is defined as 0 volts.

Question

Quizplus · Accepted Answer

Option I is true for the measurement of standard reduction potentials, as standard conditions for reduction potentials is 25°C and A = 1 for all aqueous and gaseous species. Option II is also true, as reduction potentials are measured relative to the standard hydrogen electrode (S.H.E.). Similarly, option IV is also true as the ES° for the S.H.E. is defined as 0 volts. However, option III is not true, as standard reduction potentials are measured while connected to the positive electrode of the potentiometer (not negative). Therefore, the correct choice is D.

All of the Following Are True for the Measurement of Standard