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The Absorption Spectra of Nickel

Absorption Spectra of Aqueous Nickel
The Absorption Spectra of Aqueous Solutions of Nickel Salt.
For the colour of nickel, vide swpra. The absorption spectra of green conc. aq. soln. of nickel salts shows continuous absorption bands at the violet and red ends, whilst dil. soln. of the chloride, sulphate, and nitrate show a feeble absorption band at 6563 which is characteristic. Observations on the absorption spectra of aqueous, alcoholic, or acetone soln. of nickel salts were made by D. Brewster, H. Becquerel, V. Agafanofi, H. Emsmann, M. Pavlik, W. N. Hartley,,T. M. Hiebendaal, T. Inoue, C. Kubierschky, H. Ley, E. Muller, J. L. Soret, J. Moir, J. von Koczkas, Y. Shibata and K. Matsuno, R. Samuel and co-workers, M. Kahanowicz and P. Orecchioni, J. Gielessen, J. C. McLennan and co-workers, N. S. KurnakofE, T. Dreisch, J. Angerstein, H. W. Vogel, M. Kimura and M. Takewaki, R. A. Houstoun and co-workers, H. C. Jones and J. A. Anderson, and J. Formanek.
Absorption Spectra of solutions of Nickel salt
The Absorption Spectra of Aqueous and Alcoholic Solutions of Nickel Salts.
The colour of nickel was discussed by J. Piccard and E. Thomas. The mol. extinction coeff., A, is a function of wave-length, A, as indicated by R. A. Houstoun, whose results for aq. soln. are summarized in Fig. - vide the absorption spectra of cobalt salts. The effect of concentration on the mol. extinction coeff. of aq. soln. of nickel chloride is summarized in Fig. The three aq. soln. have the respective concentrations 0.10, 1.00, and 4.00 mols. per litre; and the alcoholic soln. has the concentration 0.026 mol per litre. Nickel chloride in a conc. hydrochloric acid soln. is yellowish-green. The soln. absorbs feebly in the red and strongly in the blue and violet. By diluting the soln., no absorption bands appear, but the continuous absorption in the red and violet becomes weaker. Ammoniacal soln. of nickel salts have a broad absorption band in the yellow at about 5740. Alcoholic soln. of nickel salts are green, and the conc. soln. have a strong absorption band in the red and violet. If the soln. be diluted with alcohol, the absorption is weaker, and besides a continuous absorption in the red and violet there is a weak band at 6607. R. A. Houstoun and A. H. Gray found for the mol. extinction coeff. of alcoholic soln. of nickel salts the results summarized in Fig. and for acetone soln.. the results indicated in Fig.

Effect Concentration to Absorption Spectra Nickel
The Effect of Concentration on the Absorption Spectra.
Absorption Spectra of Alcoholic Solution of Nickel Salts
Absorption Spectra of Alcoholic Solution of Nickel Salts.
Absorption Spectra of Acetone Solution of Nickel Salts
Absorption Spectra of Acetone Solutions of Nickel Salts.

According to J. Formanek, tincture of alkanna reacts directly with nickel salts so that a neutral soln. of nickel chloride becomes violet, and the absorption spectrum shows a band at 6192, and subordinate bands at 5725 and 5320. If a drop or two of ammonia be added to the liquid, the colour becomes more blue, there is a small displacement of the three bands respectively to 6198, 5732, and 5325; with more ammonia, a blue precipitate appears. Similar results were obtained with a soln. of the nitrate. M. Luckiesh, D. Starkie and W. E. S. Turner, T. Dreisch, R. W. Wood, H. P. Gage and W. C. Taylor, and P. Gilard and P. Swings studied the spectral transmission of glasses coloured with nickel.

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