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Chapter 20: Problem 85

Which of the following ions is(are) expected to form colored octahedral aqueous complex ions? a. \(\mathrm{Zn}^{2+}\) b. \(\mathrm{Cu}^{2+}\) c. \(\mathrm{Mn}^{3+}\) d. \(\mathrm{Ti}^{4+}\)

Short Answer

Expert verified
The ions that are expected to form colored octahedral aqueous complex ions are b. \(\mathrm{Cu}^{2+}\) (having one unpaired electron in the 3d orbitals) and c. \(\mathrm{Mn}^{3+}\) (having four unpaired electrons in the 3d orbitals).

Step by step solution

01

Write down the electronic configurations of the metal ions

We need to know the electronic configurations of the given ions, so let's write them down: a. \(\mathrm{Zn^{2+}}\): \([Ar] 3d^{10}\) b. \(\mathrm{Cu^{2+}}\): \([Ar] 3d^{9}\) c. \(\mathrm{Mn^{3+}}\): \([Ar] 3d^{4}\) d. \(\mathrm{Ti^{4+}}\): \([Ar] 3d^{0}\)
02

Analyze unpaired electrons in d-orbitals

Now, we will analyze each ion's electronic configuration to see if they have unpaired electrons in their d-orbitals: a. \(\mathrm{Zn^{2+}}\): There are no unpaired electrons in the 3d orbitals. b. \(\mathrm{Cu^{2+}}\): There is one unpaired electron in the 3d orbitals. c. \(\mathrm{Mn^{3+}}\): There are four unpaired electrons in the 3d orbitals. d. \(\mathrm{Ti^{4+}}\): There are no unpaired electrons in the 3d orbitals.
03

Determine which ions form colored octahedral complexes

Based on the presence of unpaired electrons in their d-orbitals, we can determine which ions are likely to form colored octahedral complexes: a. \(\mathrm{Zn^{2+}}\): No unpaired electrons, so it is not expected to form a colored complex. b. \(\mathrm{Cu^{2+}}\): One unpaired electron, so it is expected to form a colored complex. c. \(\mathrm{Mn^{3+}}\): Four unpaired electrons, so it is also expected to form a colored complex. d. \(\mathrm{Ti^{4+}}\): No unpaired electrons, so it is not expected to form a colored complex. So, the answer is: b. \(\mathrm{Cu}^{2+}\) and c. \(\mathrm{Mn}^{3+}\) are expected to form colored octahedral aqueous complex ions.

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Most popular questions from this chapter

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