A) From the ionization constant, calculate the standard Gibbs free-energy change for the ionization of acetic acid in water at 25∘. Ka=1.80×10−5 Express your answer using three significant figures. ΔrG0 = ____ kJ/mol B) What is the Gibbs free-energy change at equilibrium for the ionization of acetic acid in water at 25∘C? Express your answer using three significant figures. ΔrG = _____ kJ/mol C) What is the Gibbs free-energy change for the following reaction in water at 25∘C ? Note that this reaction is the inverse of the dissociation reaction of part A. H+ (10−4M) +OAc− (10−2M) →HOAc (1M) Express your answer using three significant figures. ΔrG = ______ kJ/mol D) What is the Gibbs free-energy change for the following reaction in water at 25∘C ? H+ (10−4M) +OAc− (10−2M) →HOAc (10−5M) Express your answer using three significant figures. ΔrG = ______ kJ/mol