The figure shows spectra of 1.00×10^-4 M MnO^-₄, 1.00×10^-4 M Cr₂O₇^2-, and an unknown mixture of both, all in 1.000-cm-pathlength cells. Absorbances are given in the table. Use the least-squares procedure in Figure 18-3 to find the concentration of each species in the mixture.

Figure 18-3

Transcribed Image Text:

Wavelength (nm) MnO standard Cr andard Mixture 266 288 320 350 360 0.042 0.082 0.168 0.125 0.056 0.410 0.283 0.158 0.318 0.181 0.766 0.571 0.422 0.672 0.366 0.9 0.8 Mixture 8 0.6 0.5 0.4 0.3 Mno 0.1 250 300 350 400 450 500 550 600 650 Wavelength (nm)