A student was given a standard Fe(s) | Fe+2 (aq) half-cell and another half-cell containing an unknown metal M immersed in 1 M MNO3(aq). When these two half-cells were connected at 25 (degrees) C, the complete cell functioned as a galvanic cell with E = 1.24 V. The reaction was allowed to continue overnight and the two electrodes were weighted. The iron electrode was found to be lighter and the unknown metal electrode was heavier. What is the standard potential of the unknown M+/M couple?
Standard potential of a battery?
Look up the iron half cell potential and subtract.
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