(Solved): Question (4): 1. How many unpaired electrons would [MnCl6]4 has? Give electronic configuratio ...

Question (4): 1. How many unpaired electrons would $${\left[{\mathrm{MnCl}}_6\right]}^{4?}$$ has? Give electronic configurations in terms of the $$t_{2g}$$ and $$e_g$$ sets. 2. Based on CFSE, classify the following complex ions as inert or labile. a) $${\left[\mathrm{Mn}{\left({\mathrm{NH}}_3\right)}_6\right]}^{2+}$$ b) $${\left[{\mathrm{MnI}}_6\right]}^{4?}$$ 3. Write chemical equations of the stepwise replacement of water by ammonia in the following substitution reaction. Then write the overall formation constant $$({\mathrm{K}}_{\mathrm{f}}$$ or $${?}_4)$$. $${\left[\mathrm{Ni}{\left({\mathrm{H}}_2\mathrm{O}\right)}_4\right]}^{2+}+4{\mathrm{NH}}_3?{\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$$ 4. The complex ion $${\left[\mathrm{Fe}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3\right]}^{3?}$$ has high $${\mathrm{K}}_{\mathrm{f}}$$ value, which is about $$2\times 10^{20}$$, Give reason based on its structure.