chemistry

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A voltaic cell is constructed based on the following reaction and initial concentrations:
Fe^2+,( 0.0055 M ) + Ag+,( 2.5 M ) ----> Fe^3+,( 0.0055 M ) + Ag(s)
<----
its a forward and reverse arrow

Calculate [Fe^2]+ when the cell reaction reaches equilibrium

can someone please explain how to do this?

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