. Cyanamid, manufacture, chemistry and uses, by Edward J. Pranke ... â 31-4 42 4 â â 40 5 â â 33 6 â â 31 9 I7I-3 13-4 53-7 24 12 23 15 375-o 19 18 245-2 21 21 525-° 20 CYANAMIDâMANUFACTURE, CHEMISTRY AND USES 41 In Fig. 3 is plotted the percentage of the cyanamide removedwith increase of concentration. This percentage is a maximumat the lower concentrations, but decreases as the concentrationincreases, until finally a steady value of abou
. Cyanamid, manufacture, chemistry and uses, by Edward J. Pranke ... â 31-4 42 4 â â 40 5 â â 33 6 â â 31 9 I7I-3 13-4 53-7 24 12 23 15 375-o 19 18 245-2 21 21 525-° 20 CYANAMIDâMANUFACTURE, CHEMISTRY AND USES 41 In Fig. 3 is plotted the percentage of the cyanamide removedwith increase of concentration. This percentage is a maximumat the lower concentrations, but decreases as the concentrationincreases, until finally a steady value of about 20 per cent, isreached, when the amount of cyanamide disappearing in agiven time is constant. The fact that this curve is approxi-mately logarithmic indicates that the primary action is one ofabsorption, since it is well-known that the more dilute the solu-tion the greater is the percentage of substance taken up by theabsorbing surfaces, and that as the concentration of solution EFFECT OF CONCENTRATIONON REMOVAL OF CYANAMIDEFROM SOIL 0j 05 Fig. 3- increases a condition of equilibrium is reached and the ratioof the concentrations in the absorbing surfaces and in thesolution becomes constant. Fig. 4 shows the absolute quantity of cyanamide removed asthe concentration increases. It is practically directly propor-tionally to the concentration. This curve shows the samefact as the curve in Fig. 4, namely, that the ratio of the con-centrations in the absorbing surfaces and in the solution is 42 CYANAMIDâMANUFACTURE, CHEMISTRY AND USES a constant, a fact highly characteristic of absorption pro-cesses. In this experiment also, the cyanamide finally disappearsentirely from the solution in the course of time, and hence,chemical conversion occurs along with the absorptionphenomena. Taking all the above facts together, it is easy to under-stand that in the initial period of contact between the cyanamidesolution and the soil there is a withdrawal of cyana
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1913
