A Further Study of the Absorption of Aqueous Solutions at 4.72mgr;

摘要

By the use of a grating spectrometer, the infrahyphen;red absorption spectra of aqueous solutions of five inorganic materials (KI, CuBr2, ZnBr2, CdCl2middot;2H2O, and NaOH) and six organic materials (acetone, CH3COONa, CH3COONH4, cane sugar, C6H5OH, and C2H5OH) were observed in the region of the water band at 4.72mgr;. The organic materials investigated caused a displacement of the position of maximum absorption to shorter wavehyphen;lengths; the inorganic materials apparently caused a shift to longer wavehyphen;lengths, but the actual effect on the water band may be masked by other absorption bands in the same region. The concentrationhyphen;shift relationship was investigated for some of the materials. Size of the solute molecule and the positive ion seemed to be of comparatively little importance.