Acta Phys. -Chim. Sin. ›› 1992, Vol. 8 ›› Issue (01): 132-135.doi: 10.3866/PKU.WHXB19920124

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Study on the Thermodynamic Properties of Hydrochloric Acid in Aqueous Solutions Containing Amino Acid I. Glycine+Hydrochloric acid+Water

Zhu Yuan-Liang; Zhou Xi-Shun; Yang Fa-Wang; Lu Jin-Suo   

  1. Chemical Department of Henan Normal University, Xinxiang 453002
  • Received:1990-08-14 Revised:1991-09-14 Published:1992-02-15
  • Contact: Zhou Xi-Shun

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Abstract: Standard potentials (E°_m) of the Ag-AgCl electrode in Glycine+H_2O mixture at 25 ℃, 30 ℃, 35 ℃, 40 ℃, and 45 ℃ have been determined from the EMF measurements of cells of the type:
Pt, H (g, 101.325 kPa)|HCl(m)+Glycine+H_2O|AgCl-Ag
These values have been utilized to evaluate the transfer energetics (ΔG°_t, ΔH°_t, ΔS°_t) accompanying the transfer of 1 mol HCl from the standard state in water to the standard state in Glycine+H_2O mixtures. Attempts have been made to explain the transfer energetics varying with different compositions of Glycine+H_2O mixtures in the light of ion-solvent interactions and the structureal effects of the solvents.

Key words: Hydrochloric acid, Glycine, Standard potentials, Transfer energetics, Interactions