Establishment of a Hydrogen Scale in 80 Mass % Propylene Carbonate + <Emphasis Type="Italic">p</Emphasis>-Xylene Medium |
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Authors: | Damaraju Parvatalu Ashwini K Srivastava |
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Institution: | (1) Department of Chemistry, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400 098, Maharashtra, India |
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Abstract: | Details of the standardization of the reference electrode Hg/HgCl2(s) versus the SHE by a potentiometric method using two acids (viz., perchloric and 2,5-dichlorobenzene-sulfonic acids) in 80
mass % propylene carbonate (PC) + p-xylene (PX), are presented. Using this reference electrode, the standard electrode potential of the quinhydrone electrode
was determined in this medium. The reference electrode potential and the standard electrode potential of the quinhydrone electrode
were found to be (0.277±0.003) and (0.760±0.003) V versus SHE in 80 mass % PC + PX at 25 °C, respectively. The voltammetric
behavior of the quinhydrone system in this medium was investigated at a micro platinum electrode against a non-aqueous double-junction
Ag/AgCl reference electrode. The standard electrode potential of the quinhydrone system was also calculated using voltammetric
and chronocoulometric data that is comparable with the value obtained by potentiometry. |
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Keywords: | Propylene carbonate p-Xylene Quinhydrone electrode Potentiometry Voltammetry Chronocoulometry |
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