The magnitudes (but not the signs) of the standard reduction potentials of two metals X and Y are

where the 0 0 notation denotes that only the magnitude (but not the sign) of the E° value is shown. When the half-cells of X and Y are connected, electrons flow from X to Y. When X is connected to a SHE, electrons flow from X to SHE.
(a) Are the E° values of the half-reactions positive or negative?
(b) What is the standard emf of a cell made up of X and Y?

Transcribed Image Text:

Y2+ + 2e - Y X2+ + 2e - X E| = 0.34 V JE"| = 0.25 V %3D