Problem 53
Describe an experiment that would determine whether nickel in \(\mathrm{K}_{2}\left[\mathrm{NiCl}_{4}\right]\) is square-planar or tetrahedral.
Problem 54
Which of the following high-spin complexes has the greatest number of unpaired electrons? (a) \(\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) \((c)\left[\operatorname{re}\left(H_{2} O\right)_{6}\right]^{2+}\) \((b)\left[\operatorname{Mn}\left(H_{2} O\right)_{6}\right]^{2+}\) \((d)\left[N i\left(H_{2} O\right)_{6}\right]^{2+}\)
Problem 55
How many unpaired electrons are expected for high-spin and low-spin complexes of \(\mathrm{Fe}^{2+} ?\)
Problem 56
Excess silver nitrate is added to a solution containing 1.0 mol of \(\left|\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right| \mathrm{Cl} .\) What amount of AgCl (in moles) will precipitate?
Problem 57
Which of the following complex ions is (are) square-planar? (a) \(\left[\mathrm{Ti}(\mathrm{CN})_{4}\right]^{2}\) (c) \(\left[\mathrm{Zn}(\mathrm{CN})_{4}\right]^{2}\) (b) \(\left.| \mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) \((\mathrm{d})\left[\mathrm{Pt}(\mathrm{CN})_{4}\right]^{2-}\)
Problem 58
Which of the following complex ions containing the oxalate ion is (are) chiral? (a) \(\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right) \mathrm{Cl}_{4}\right]^{2-}\) (b) \(c i s-\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{2} \mathrm{Cl}_{2}\right]^{2}\) (c) trans - \(-\left[\mathrm{Fe}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{2} \mathrm{Cl}_{2}\right]^{2-}\)
Problem 59
How many geometric isomers are possible for the square-planar complex ion \(\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)(\mathrm{CN}) \mathrm{Cl}_{2}\right]^{-} ?\)
Problem 60
For a tetrahedral complex of a metal in the first transition series, which of the following statements concerning energies of the \(3 d\) orbitals is correct? (a) The five \(d\) orbitals have the same energy. (b) The \(d_{x^{2}-y^{2}}\) and \(d_{z^{2}}\) orbitals are higher in energy than the \(d_{x y} d_{y y}\) and \(d_{x y}\) orbitals. (c) The \(d_{x z} d_{y z}\) and \(d_{x y}\) orbitals are higher in energy than the \(d_{x^{2}-y^{2}}\) and \(d_{z^{2}}\) orbitals.
Problem 62
For the low-spin coordination compound \(\left[\mathrm{Fe}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right] \mathrm{Cl},\) identify the following. (a) the oxidation number of iron (b) the coordination number for iron (c) the coordination geometry for iron (d) the number of unpaired electrons per metal atonn (e) whether the complex is diamagnetic or paramagnetic (f) the number of geometric isomers
Problem 63
For the high-spin coordination compound \(\mathrm{Mn}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2},\) identify the following. (a) the oxidation number of manganese (b) the coordination number for manganese (c) the coordination geometry for manganese (d) the number of unpaired electrons per metal atom (e) whether the complex is diamagnetic or paramagnetic (f) the number of geometric isomers
