3. Determine the oxidation number for the indicated element in each of the following substances: (a) S in SO2 , (b) C in COCl2 , (c) Mn in MnO4 - , (d)N in N2H4 , (e) N in HNO2 , (f) Cr in Cr2O7 2-

2. Write balanced net ionic equations describing each of the following reactions: Dissolution of Ni(OH), in nitric acid. Oxidation of Cr to Cr by CIO in alkaline solution (CIO is converted to Cr). The confirming test for Fe

Construct the octahedral crystal-field splitting diagram for the metal in each species. V(H,0);* Fe(CN);- Mn(H,O); * ODO OO口 Answer Bank 11

The electronic absorption spectrum of an acidic solution of [Ti(H,O),JP* exhibits two well-separated bands at 430 and 650 nm, respectively, assignable to "d-d transition. But the oxidized form [Ti(H,O),}³" shows only one absorption at 490 nm with a shoulder around 580 nm. Explain the observation. A. [Ti(H;O),J³* has more d electrons than [Ti(H;O).J**. B. [Ti(H,O),]³" is a strong oxidizing agent. C. [Ti(H,O),}³" shows stronger Jahn-Teller effect. D. [Ti(H,O)]" shows stronger Jahn-Teller effect. E. H,0 is a weak-field ligand.