Question

EXERCISES 153 Woodward's rules, predict the absorption maximum for the 2-5 Using following compound: Ans: 349 nm 2-6 A 10- M solution of Cu(lI) in concentrated HCl is a pale green-blue. whereas Cu(II) in concentrated ammonia is an intense blue-violet color. (a) What is the mechanism of absorption which is responsible for cupric-ion solu- tions being colored? (b) Explain why ammonia gives Cu(II) solutions an intense blue-violet color whereas HCI imparts a pale green-blue color. (e) For a quantitative analysis of cupric ion in ammoniacal solution with a spec- trophotometer, approximately what wavelength of visible length would you use? Ans: (c) About 580 nm 2-7 Hemoglobin, an iron-containing porphyrin in blood, is reddish-purple in color. Predict the wavelength region in the visible spectrum where hemoglobin should absorb. Ans: About 490 to 560 nm. In practice, 555 nm is often used for analysis

Can you do Q6?

Answer 1