Effect of the Acidic and Alkaline Solutions on K2CrO4 and K2Cr2O7 by Ultraviolet and Visible Measurement

Mohammad Radi Mohammad; Hasanain Saad Azeez

doi:10.23851/mjs.v30i1.722

Authors

Mohammad Radi Mohammad Department of Applied Sciences, University of Technology
Hasanain Saad Azeez Department of Applied Sciences, University of Technology

DOI:

https://doi.org/10.23851/mjs.v30i1.722

Keywords:

Alkaline, Stoke solutions, pH values, Wavelength, Red shift, Spectrum

Abstract

In this work different amount of acidic (HCl) and alkaline (NaOH) solutions were added to stoke solutions of K₂CrO₄ and K₂Cr₂O₇to show the effect of pH values on their spectra. The results of UV-Visible spectroscopy shows that, the Changing of solution pH value when drops of HCl were added led to shift wavelength of K₂CrO₄spectrum while no change has been occurred in K₂Cr₂O₇spectrum. However, Changing PH values solution by adding drops of NaOH led to change in wavelength red shift for K₂Cr₂O₇ while no changes has been occurred in spectrum of K₂CrO₄.

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