Determination of Molecular Mass of Strong Acids by Differential Temperature Model (DTM) Using H<sub>3</sub>PO<sub>4</sub> and HBF<sub>4</sub> for Classical Demonstration
- 1 Thermodynamics and Electrochemical Laboratory, Department of Chemistry, University of Uyo, Uyo, Nigeria
Abstract
A new chemical hypothesis based on the differential temperature model (DTM) for estimation of molecular masses of some strong acids (H 2 SO 4 , HNO 3 and HCl) in solutions have previously been propounded and tested theoretically and analytically by the author. The results were published in the Bulletin of Pure and Applied Sciences–Chemistry in 2012. The changes in temperature following various dilutions of the acids were found to be proportional to their molecular properties. The new chemical hypothesis and model is hereby tested on H 3 PO 4 and HBF 4 and their exact molecular masses have been evaluated analytically and theoretically. The validity of the hypothesis and the model is hereby presented for chemical proof and adoption to theory by chemists.
- Ebbing, D.D. and Gammon, S.D. (1999) General Chemistry. 6th Edition, Houghton Miffin Company; Boston, New York, 105, 320, 485.
- Sharma, K.K. and Sharma, L.K. (1999) A Textbook of Physical Chemistry. 4th Rev. Edition, Vikas Publishing House, PVT Ltd. India, 160, 165-167.
- Mendham, J., Denney, R.C. and Thomas, M.J.K. (2000) Vogel’s Textbook of Quantitative Chemical Analysis. 6th Edition, Person Education Limited, Edinburgh Gate, Harlow, Essex, 34-35
- Mahan, B.H. (1980) University Chemistry. 3rd Edition, Addison-Wesley Publishing Company, Inc., Philippines, 248- 449.
- Berry, S.R., Rice, S.A. and Ross, J. (2000) Physical Chemistry. 2nd Edition, Oxford Uni-versity Press, Oxford, New York, 35-38.
- Akpan, I.A. (2012) Thermochemical Model for the Determination of the Relative Molecular Mass of Strong Acids from Heat of Solution. Bulletin of Pure and Applied Sciences, Vol. 31C - Chemistry (No.1), 93-100.
- Sharma, K.K. and Sharma, D.S. (1982) An Introduction to Practical Chemistry. 1st Edition, Vikas Publishing House PVT Ltd. India, 254-255.
- Akpan, I.A. (2012) Test for Ionization and Formation of Oxonium in Acid Solutions. Bulletin of Pure and Applied Sciences. Vol. 31c - Chemistry (No. 1), 11-14.