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Thermodynamic studies of zinc chloride in mixed aqueous solvents from electromotive force measurments I. methanol-water mixtures

✍ Scribed by Andrzej Lewandowski

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 334 KB
Volume: 23
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(78)80008-5

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✦ Synopsis

Abatmct -From the enrfmeasurements of the cell Pt/Zn(Hg)/ZnCl,, CHSOH, H,O/AgCI/Ag the standard emj of the cell have ken determined for mass fractions of methanol of IO, 20,30,50 and 70% at 298 K, 303 K, 308 K and 313 K in the molality range for zinc chloride from 0.004 to 0.1 mol kg-'. These data were used in calculations ol: (a) the mean activitj weflkient of zinc chloride, (b) thtz primary medium elkt; (c) 'the standard thermodynamic quantities for the cell reaction and for the transfer of zinc chloride born water to mixed solveuts.

10" Qj in coniunction with standard cell. Measurements were done first at 298 K, then at 303 K, 36g K, 313 K and again at 298 K. For the equilibrium enf a value which was constant at & 0.1 mV during the time of one half hour was taken.

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