An excess of finely pulverised iron is stirred up with a solution that contains 1 M Cu2+ ions, and the system is allowed to come to equilibrium. The solid materials are then filtered off and electrodes of solid copper and solid iron inserted into the remaining solution. What is the value of the ratio of [Fe2+]/[Cu2+] at 25ºC?
Eº(Fe2+/Fe) = -0.44 V
Eº(Cu2+/Cu) = +0.34 V
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