Isopiestic determination of the osmotic and activity coefficients of the { y Mg(NO 3 ) 2 + (1 − y )MgSO 4 }(aq) system at T = 298.15 K Ivanović, T.; Popović, D.Ž.; Rard, J.A.; Grujić, S.R.; Miladinović, Z.P.; Miladinović, J.; The Journal of Chemical Thermodynamics 2017, 113, 91-103