engleski

THERMODYNAMIC STUDY OF CdCl2 IN 2-PROPANOL (5 MASS %) + WATER MIXTURE USING POTENTIOMETRY

The potential difference (pd) measurements (E) are reported for galvanic cell without liquid junction: Cd(Hg) (l, sat.)/CdCl2(b) in Z/AgCl(s)/Ag(s) at different temperatures and various CdCl2 molalities (b) in aqueous mixture of 2-propanol (containing 5 mass % 2-propanol). From these values and using literature data for stability constants of the chlorocadmium complexes, the values of the standard pd of the cell were obtained at each temperature. These values served to calculate the standard thermodynamic quantities for the cell reaction, and also mean molal activity coefficients of CdCl2. The corresponding thermodynamic results are discussed and compared with literature data.

thermodynamic properties; cadmium chloride; 2-propanol + water mixed solvent; potentiometry

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