1. Predict the maximum oxidation state and the most stable secondary oxidation state for the following elements: i. Bi ii. W iii. Os
2- 1. Slow addition of small amount of aqueous 2M NH3 to aqueous solution of Ni(NO3)2 (compound 1) yield a green precipitate (compound 2) which dissolved (compound 3) upon continued addition. Identify:
compound 1
compound 2
compound 3
A. Ni2+
B. Ni(NO3)2
C. NiO
D. [Ni(H2O)6] 2+
E. [Ni(H2O)4(OH)2]
F. [Ni(OH)4]2-
G. [Ni(NH3)6]2+