onsider the following equilibrium system:  MnO4− + 4 H+ + 3 e− ⇌ MnO2(s) + 2 H2O(l) (a) Calculate the pEo value. (HINT: Consult this standard reduction potential table  (b) Calculate the actual pE of a 50.0-L neutral aqueous solution containing 10.0 g of potassium permangante (KMnO4).  Assume that only chemistry in the equilibrium system above determines the pE.  (HINTS:  In an equilibrium constant (K) or reaction quotient (Q) expression, pure solids and liquids behave has if they have values of 1.  Concentrations in these expressions must be in mol L−1.)

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