THERMODYNAMIC STUDIES OF CADMIUM SULFATE IN AQUEOUS GLYCEROL FROM ELECTROMOTIVE-FORCE MEASUREMENTS

The standard molal potentials of the cell Cd-Hg/CdSO4(m), glycerol(x)/ Hg2SO4(s)/Hg, has been determined in water and 10, 30, 50 and 70% aque ous glycerol solutions at five different temperatures from 298 to 318 K and molality of CdSO4 ranged from 0.01 to 0.1 mol kg(-1). Mean molal activity coefficients at 298 K are calculated. The temperature variat ion of the standard c.m.f. is used to calculate the standard thermodyn amic function Delta G degrees, for the cell reaction. The primary medi um effect of different solvents upon cadmium sulphate and standard qua ntities for the transfer of cadmium sulphate from the standard state i n water to the standard state in the respective glycerol + water solut ions are also calculated and the results are discussed.