CHEMICAL ANTAGONISM OF IONS : II. ANTAGONISM BETWEEN ANIONS AND ALSO BETWEEN CATIONS AND ANIONS IN THEIR EFFECT ON OXALATE ACTIVITY.
Sulfate ions (SO(4) (=)) produce an anomalous effect on the ionization of oxalate diion, opposite in direction to the effect of Mg(++) ions. This effect of sulfate is antagonized by the presence of Cl(-) ions according to the equation: See PDF for Equation where f' is the antilog of the increase in pK(2)' due to the sulfate. In solutions containing up to 0.03 molar MgSO(4) the effect of Mg(++) predominates over that of SO(4) (=). Above 0.1 molar the effect of SO(4) (=) predominates and tends to neutralize the initial deviation. In solutions containing fixed amounts of MgCl(2) and varying amounts of NaSO(4) (or vice versa) the effects of these two salts sharply antagonize each other in all proportions.
Simms
H S
HS
Department of Animal Pathology of The Rockefeller Institute for Medical Research, Princeton, N. J.