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Nomograph for the Solubility of Chlorine in Water D. S. DAVIS Wayne University, Detroit, Mich.
T
HE most recent data on the solubility of chlorine in water
enable construction of the nomograph from which solubilities, corresponding to any temperature and pressure in the ranges of the data, can be read quickly and accurately. The use of the chart is illustrated as follows: What is the solubility of chlorine in water when the chlorine pressure is 0.6 atmosphere and the temperature is 20" C.7 Following the key, connect 0.6 on the pl scale with 20 on the tl scale and produce the line to the vertical axis a t the right. Connect 0.6 on the p , scale with 20 on the tz scale and produce this line to the vertical axis at the left. A line connecting the intersections at c = ap bp'h the right and left axes will cut the S scale in the desired value, where a and b depend upon temperature. 4.89 grams of chlorine per 1000 grams of water. This equation and a table given by Whitney and Vivian Since the molecular weight of chlorine is 70.91, X in grams of chlorine per 1000 grams of water is equal to 709.1 c. I Whitney, R. P., and Vivian, J. E , IND.ENQ.CFIBM., 33, 741 (1941). 1202 are those of Whitney and Vivian' who presented pressureconcentration isotherms in addition to tabular information for the ranges of 10" to 25" C., 0.06 to 1.0 atmosphere chlorine pressure, and 0.1 to 0.8 gram of chlorine per 100 grams of water. From sound theoretical considerations they derived a relation between c, the concentration of chlorine (in all forms) as moles per 100 grams of water, and p , the chlorine pressure in atmospheres, equivalent to
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