The solubility of barium sulfate varies with the composition of the solvent in which it was dissolved. In which solvent mixture would BaSO4 have the lowest solubility? A) pure water B) 0.10 M Na2SO4(aq) C) 1.0 M (NH4)2SO4(aq) D) 0.5 M Ba(NO3)2(aq) E) 1.0 M HCl(aq)