Question

The answer is c but I don’t get why?

10. The standard potential for the reaction Q + Q is Eo That for Rt +eR is E. A solution 1 molar in and I molar in R is agitated in the presence of excess solid R metal. When equilibrium is attained, the solution is found by direct analysis to be 1.3 molar in R1.3 molar in Q, and 0.7 molar inQ On the basis of these data, which of the following conclusions about the stan- dard potentials can be deduced? R: (B) EO FR (C) > E (D) Ep > 0 (E) ER + B=0

Answer 1

To attained the equilibrium R converts into R^+ and Q^3 + converts in Q^2+ over all reactions t = 0 t = alpha^m R + Q63 + rightleftarrow Rt^+ Q^2 + Reaction gos in forward direction E > 0 (triangle G degree < 0) Q^3 + e^- rightleftarrow Q^2 + E = E_Q equation (1) R^+ + e^- rightleftarrow R E^0 = E_R^0 reverse the reaction R rightleftarrow R^+ e^- E^0 = -E_R equation (2) equation (1) and equation (2)Q^3 + R rightleftarrow R^+ + Q^2 +: E^0 -E_Q^0 - E_R^0 For spontaneous in forward direction E^0 > 0 E_Q^0 - E_R^0 > 0 Ans