. The Philosophical magazine; a journal of theoretical, experimental and applied physics. 7. Curces of KCl, KBr, and KI. All the substances were hi(^hly pure, colourless, and inodo-rous ; the iodide was very fainrly alkaline. The solutions wereof the same range of degrees of strength as the strong ones ofthe corresponding acids, viz. from 1 to IO grain of substancein 155 grains of water. The electromotive force of the zinc-platinum couple increased somewhat with the period of immer-sion. The absence of solid films upon the zinc was provedby occasionally replacing the saline liquid by distilled
. The Philosophical magazine; a journal of theoretical, experimental and applied physics. 7. Curces of KCl, KBr, and KI. All the substances were hi(^hly pure, colourless, and inodo-rous ; the iodide was very fainrly alkaline. The solutions wereof the same range of degrees of strength as the strong ones ofthe corresponding acids, viz. from 1 to IO grain of substancein 155 grains of water. The electromotive force of the zinc-platinum couple increased somewhat with the period of immer-sion. The absence of solid films upon the zinc was provedby occasionally replacing the saline liquid by distilled water,and observing whether the cell was still exactly balanced by azinc-platinum water on(5. Department of Cliemical Refearch. 411 Fig. of KCl. Br. nnd KCl al 15° C. KBratlSC. KI at 10* C. The curves of these substances are all drawn upon the samescale of magnitude as those of the strong solutions of thecorresponding acids. They show:—1st. A much greaterincrease of the electromotive force caused by the first amountof substance added than by the subsequent ones. 2nd. Agradation of degree of first increase and of maximum electro-motive force, varying inversely as the magnitudes of mole-cular weight of the substances. 3rd. Large differences ofform, characteristic of each individual substance. And substitution of potassium for hydrogen in the correspond-ing acids lowered the electromotive force in all three cases, andthe amount of this reduction varied inversely as the magni-tudes of the molecular weights of the substances ; the unionof potassium with the halogens had similar eflFects, but inmuch greater degrees (compare the respective figures). 8. Curve of K^r at 60° range of degrees of strength of the solution in this
Size: 1639px × 1525px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookids, bookpublisherlondontaylorfrancisetc, booksubjectphysics
