4. (20 pts total, 5 pts. each) Ammonium dichromate INH) Cr,01] is a bright orang

Question

4. (20 pts total, 5 pts. each) Ammonium dichromate INH) Cr,01] is a bright orange inorganic salt. a. At what wavenumbers would a sample of ammonium dichromate absorb in the IR region? Which of the following window materials would be the best for collecting the full IR spectrum of ammonium dichromate? b. KBr NaCl CsI c. How many normal modes of vibration does dichromate (Cr,01) have? 3(7)-? Ammonium dichromate will dissolve in both H20 and D2O to give a bright orange solution. Which would be the best solvent to perform solution IR in? d.

Explanation / Answer

a) Ammonium dichromate will absorb at 3200 (N-H) streaching 1400 (Cr=O) streaching adn 900 for (Cr-O) streaching.

b) Generally KBr is used for determination for IR spectrum

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