Near Infrared Absorption of Solutions of Hydroxides and Hydrolyzing Salts

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Abstract
Absorption bands have been observed at 2.60μ, 2.30μ, 1.81μ, 1.30μ, 1.22μ, 1.04μ, 0.87μ, 0.79μ, 0.75μ and 0.67μ in aqueous solutions of hydroxides and hydrolyzing salts. From the behavior of the salt solutions the bands at 2.60μ and 1.81μ were found to be characteristic of the hydroxide molecule, while the band at 2.30μ was found to be characteristic of the OH ion. It was found that if the 2.30μ band, and the 3.65μ and 5.20μ bands previously observed were considered as fundamentals, the remaining bands observed could be classified as harmonics.

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