Note 228 — Chapter VII · PHYSICAL OR HETEROGENEOUS EQUILIBRIUM.—THE COLLOIDAL CONDITION
Reading edition
An aqueous solution of iodine and potassium iodide shaken with chloroform gives similar results, and the difference in color between the two layers is an advantage for a lecture experiment. But the iodine is partially combined with the iodide, according to KI + I2 ⇄ KI3, or I− + I2 ⇄ I3−, and the theoretical relations are not so simple as for bromine in aqueous and chloroform solutions.