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


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




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


In this work different amount of acidic (HCl) and alkaline (NaOH) solutions were added to stoke solutions of K2CrO4 and K2Cr2O7 to 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 K2CrO4 spectrum while no change has been occurred in K2Cr2O7 spectrum. 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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Original Article

How to Cite

M. R. Mohammad and H. S. Azeez, “Effect of the Acidic and Alkaline Solutions on K2CrO4 and K2Cr2O7 by Ultraviolet and Visible Measurement”, Al-Mustansiriyah Journal of Science, vol. 30, no. 1, pp. 221–224, Aug. 2019, doi: 10.23851/mjs.v30i1.722.

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