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LESLIEG. JOYNER, EDWARD B. WEINBERGER AND C. W. MONTGOMERY
Vol. 67
is doubtful whether any significance can be atFrom these, the first ionization constants of tached to the negative slopes of the latter, be- glycine in salt solutions, K1* = [ ~ H ~ z / ~ H z ] o , M , cause in the range M = 0 to 0.725 the variation of have been computed. The first ionization conACPlo*is only 0.7 cal.,deg.-l mole-', which is stants of glycine in water have been obtained by probably less than the experimental error. extrapolation of the results in salt solutions. Equations for computing -log K1* as a funcThe author wishes to thank Professors H. S. Harned, B. B. Owen and S. E. Wood for many tion of temperature are given. From them, the helpful discussions. derived thermodynamic quantities [YHYZ/YHZ]O,M, ACp?*, and [YHZYOH/YZ~HZO~O,M,AFio*, Mio*, Summary Electromotive forces of the cells Hz 1 2" (mi),AS?* have been calculated and their variations HZCl(m2), NaC1(M--m2) 1 AgC1-Ag have been de- with salt concentration illustrated by plots and termined a t five-degree intervals from 5 to 55' and tables. a t six constant ionic strengths from 0.1 to 3 molal. NEW' f
