Publisher's Synopsis
Excerpt from On the State of Equilibrium of Certain Double Iodides, Cyanides, Nitrates, and Sulphates in Aqueous Solution: Dissertation Submitted to the Board of University Studies of the Johns Hopkins University for the Degree of Doctor of Philosophy
K2 Ni C N)a, we notice the absence of the green color character - istic of solution of nickel salts. Furthermore, certain reactionscharacteristic of the nickel ion do not take place With this salt. On the other hand, the double sulphate of potassian and Copper, k2�o4, Cu H2 0, has a blue color and gives the characteristic reaction of the copper ion.. This belongs to the class of double salts. But suppose the green color were present in the first case), that fact alone would not tell us that 93 salt of complex acid existed in solution, and, to continue along the same line of reasoni_o, the fact of the blue color in the second case does not tell us that all the copper is present as the Simple copper ion or in the Simple cu'so4 molecule. There are, therefore all gradations between complex and double salts. There is good reason for believing that in.many instances of double salts.
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