Study of Ion-Solvent Interaction during Acidic Dissociation of Glycine in 10, 20 And 30% Dioxane in Dioxane-Water System At 318.15K by Potentiometric Method

Authors

  • Md. Shamsuddin  Maharana Pratap Govt. P.G. College, Chittorgarh, Rajasthan, India

DOI:

https://doi.org/10.32628/IJSRST52310398

Keywords:

Ion solvent interaction, Free energy transfer, acidic dissociation constant, modified Davies equation.

Abstract

Ion solvent interaction was studied by free energy transfer during acidic dissociation of Glycine in 10,20 and 30% dioxane in dioxane-water system at 318.15K and free energy was given by the thermodynamic relation 

ΔGt = 2.303RTΔpK1

where ΔGt = free energy transfer when solvent change from water to dioxane-water.

ΔpK1 = pKs1-pKw1

where pKw1 = -log Kw1 negative logarithmic of dissociation constant of glycine in water.

pKs1 = -log Ks1negative logarithmic of acid dissociation constant of glycine in dioxane-water.

For this purpose acidic dissociatio constant of glycine was determined potentiometrically by setting up the cell:

H2(Pt) | Glycine, HCl, X% Dioxane, Hg2Cl2 | Hg …(C-1)

m1 m2 (100-x)% water

and e.m.f. of the cell was given by the formula:

E = E0- 2.303RT/F (log mH+ mcl- + log ƔH+ ƔCl_) …(1)

In the equation (1) activity coefficient of the solution has been taken into consideration to understand ion solvent interaction and activity coefficient is given by the relation:

log ƔH+ ƔCl_ = -2A¢√μ/(1+ √μ) +ꞵ1μ …(2)

Equation (2) is modified Davies equation given by B. Prasad and hence acidic dissociation constant of glycine can be calculated by calculating mH+ as: log mH+ = (E0 - E)/K - log mCl_ + (2A¢√μ/(1+ √μ)) - ꞵ1μ …(3)

References

  1. R. A. Robison and R. H. Stokes, “Electrolytic solution” (second edition) Academic Press, New York, 1959.
  2. H. S. Harned and B. B. Owen, The Physical Chemistry of Electrolytic Solution” (third edition), Reinhold, New York, 1958.
  3. A. J. Parker, Quarterly Reviews, Chemical Society, 1962, 16,163-187.
  4. A. J. Parker, Chem. Rev., 1969, 69(1), 1-32.
  5. J. Miller and A. J. Parker, J. Amer. Chem. Soc., 1961, 83(1), 117-123.
  6. H. L. Schlafer and W. Schaffernicht, Angew Chem., 1960, 72, 618-626.
  7. G. J. Janz and S. S. Danyluck, Chem. Rev., 1960, 60(2), 209-234.
  8. H. S. Harnerd and L. D. Fallon, J. Am. Chem. Soc., 1939, 61(9), 2374-2377.
  9. H. S. Harned and T. R. Dobell, J. Am. Chem. Soc., 1941, 63(12), 3308-3312.
  10. H. S. Harned and R. S. Done, J. Am. Chem. Soc., 1941, 63(10), 2579-2582.
  11. H. S. Harned and B. B. Owen, J. Am. Chem. Soc., 1930, 52(12), 5091-5102.
  12. H. S. Harned and B. B. Owen, Chem. Rev., 1939, 25(1), 31-65.
  13. B. B. Owen, J. Am. Chem. Soc., 1934, 56(8), 1695-1697.
  14. L. F. Nims and P. K. Smith, J. Bio. Chem., 1933, 101(2), 401-412.
  15. P. K. Smith and A. C. Taylor and E. R. B. Smith, J. Bio. Chem., 1937, 122(1), 109-123.
  16. C. W. Davies, H. W. Jones and C. B. Monk, Trans. Farad. Soc., 1952, 48, 921-928.
  17. V. S. K. Nair and G. H. Nancollas, J. Chem. Soc., 1958, 4144-4147.
  18. A. K. Covington, J. V. Dobson and Lord Wynne-Jones, Trans. Farad. Soc., 1965, 61, 2050-2056.
  19. L. Sharma, B. Prasad, J. Ind. Chem. Soc., 1969, 46.
  20. B. M. Prasadand J. C. Gosh, Proc. Nat. Acad. Sc. India, 1990, 60A, III, 255.
  21. A. Gupta, Ph.D Thesis, Patna University, Patna, 1986.
  22. I. L. Jenkins and C. B. Monk, J. Am. Chem. Soc., 1950, 72(6), 2695-2698.
  23. H. S. Harned and C.M., Birdsall, J. Am. Chem. Soc., 1943, 65(1), 54-57.
  24. R.C. Das, U.N. Dash and K.N. Panda, Thermochim. Acta, 1979, 32(1-2), 301-305.
  25. R.C. Das, U.N. Dash and K.N. Panda, J. Chem. Soc. Faraday Trans. I, 1980, 76, 2152-2158.
  26. U.N. Das and M.K. Mishra, Thermochim. Acta,1987, 115, 97-110.
  27. M.M. Elsemonngy, Electrochim. Acta, 1978, 23(9), 957-961.
  28. B. Prasad, J. Indian. Chem. Soc., 1977, 54, 588.
  29. H. S. Harned and R. A. Robinson, Trans. Fared. Soc., 1940, 36, 973-978.
  30. F. Frank, “Water, A Comprehensive Treatise” Vol. II, Edited by F. Frank, Plenum Press, New York, London, 1973, 1430.
  31. H. S. Frank and M. W. Evans, J. Chem. Phys., 1945, 13(11), 507-532.
  32. Md. Shamsuddin, A. K. Chaohadia, Int. J. Sci. Res. Chem., 2023, 8(3), 9-21.
  33. Md. Shamsuddin, A. K. Chaohadia, Int. J. Sci. Res. Sci. Eng. Technol., 2023, (in press).

International Journal of Scientific Research in Science and Technology

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Published

2023-06-30

Issue

Volume 10, Issue 3, May-June-2023

Section

Research Articles

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[1]
Md. Shamsuddin "Study of Ion-Solvent Interaction during Acidic Dissociation of Glycine in 10, 20 And 30% Dioxane in Dioxane-Water System At 318.15K by Potentiometric Method" International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011,Volume 10, Issue 3, pp.405-411, May-June-2023. Available at doi : https://doi.org/10.32628/IJSRST52310398