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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 6, Number 2
JKCSEZ 6(2)
April 20, 1962

Title	The Measurements of the Activity Coefficients by E. M. F. Method and A Study of the Hydration E. M. F 법에 의한 활성도계수의 측정과 Ion 수화에 대한 고찰
Author	Yull Sakong, Jung Euy Hwang 사공열, 황정의
Keywords
Abstract	In this study we have measured the activity coefficients of NaCl in solution by E.M.F. method, depending upon MacInnes' equation at 25 deg. The cell (electrodes) is same as MacInnes' except the cock which was designed by ourselves as figure 1. Additionally, we have calculated the hydration number of NaCl from the activity coefficients using Robinson's equation and ionic hydration number according to our new formula (nM+ + 0.8)/(nA- - 0.1) = nMA, which was mentioned our former thesis. We also have calculated the hydration number of some salts from the ionic hydration number using upper formula and have got reasonable series match with the other's value. As the results of our studying, we conclude it as follow; 1) Liquid junction potential depend only on the bulk concentration of the both solution. 2) The formula (nM+ + 0.8)/(nA- - 0.1) = nMA is reasonable one in deducing to ionic hydration number. 3) From upper relation, we can calculate the hydration number of unknown salts from it's ionic hydration numbers.
Page	113 - 116
Full Text	PDF

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