Abstract(1)The solubility‐product of silver tungstate was evaluated from e.m.f. of the cell,by extrapolation of the function,to x=0, and then to m=0. The solubility‐product constants in the temperature range of 20° to 40°C are expressed by(2)The molal heat of solution of silver tungstate was evaluated from the temperature coefficients of 1n Ks.p. and given by(3)Standard potentials of the Ag; Ag2WO4(s), WO4−electrode were evaluated from π°Ag;Ag+‐ K log Ks.p. It givesover this temperature range.(4)The molal free energy change for the solution of silver tungstate is given by(5)Thermodynamic Data for the formation of silver tungstate from its elements at 25°C were evaluated as follows:(6)Standard potentials of the following cells,andwere obtained by the combination of standard potentials ofandelectrodes evaluated in my previous and present investigations. It givesfor Cell (IIa), (IIb) and (IIe), respectively.(7)Thermodynamic Calculations for the exchange reactions,for reactions (iv), (v) and (vi),