3. The following figure shows the absorption speu. cobalt(II) nitrate (A), chromium(III) nitrate (B), and mixture solution of both A and B (C). 0500! 0.400 . 0.300! B Absorbance 2004 0 100 A 0.oool 400 450 550 575 500 479 500 525 Wavelength (m) Figure adapted from (J. Chem. Educ, 37, 3, 1960). (a) Explain why you observe the difference in the UV-Vis spectra of cobalt(II) nitrate and chromium(III) nitrate. (4 marks) (b) Show how you can determine the maximum absorbance, aco and acr, for cobalt(11) nitrate and chromium(III) nitrate, respectively, from the UV-Vis spectra above. (8 marks) (c) Determine the relationship between the absorbance of A, B and C using the Beer- Lambert law. (2 marks) 3. The following figure shows the absorption speu. cobalt(II) nitrate (A), chromium(III) nitrate (B), and mixture solution of both A and B (C). 0500! 0.400 . 0.300! B Absorbance 2004 0 100 A 0.oool 400 450 550 575 500 479 500 525 Wavelength (m) Figure adapted from (J. Chem. Educ, 37, 3, 1960). (a) Explain why you observe the difference in the UV-Vis spectra of cobalt(II) nitrate and chromium(III) nitrate. (4 marks) (b) Show how you can determine the maximum absorbance, aco and acr, for cobalt(11) nitrate and chromium(III) nitrate, respectively, from the UV-Vis spectra above. (8 marks) (c) Determine the relationship between the absorbance of A, B and C using the Beer- Lambert law. (2 marks)