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Chapter 20: Problem 17

Write the formulas for each of these ions and compounds: (a) tetrahydroxozincate(II), (b) pentaaquochlorochromium(III) chloride, (c) tetrabromocuprate(II), (d) ethylenediaminetetraacetatoferrate(II).

Short Answer

Expert verified
The formulas for the given ions and compounds are: (a) \(Zn(OH)_2\), (b) [\(Cr(H2O)_5Cl]Cl_2\), (c) \(CuBr_2\), (d) [\(Fe(CH2CH2(NH2)2)C4H3O4]H2\).

Step by step solution

01

Decipher Tetrahydroxozincate(II)

Tetrahydroxozincate(II) is a compound composed of zinc (Zn) with a +2 charge and four hydroxide (OH) with a -1 charge each. To create a neutral molecule, we need one zinc atom and two hydroxide ions. So, the formula is \(Zn(OH)_2\).
02

Decipher Pentaaquochlorochromium(III) Chloride

Pentaaquochlorochromium(III) chloride is a coordination compound. The 'pentaaquo' part suggests five water (H2O) molecules coordinated to the metal which is chromium (Cr) in this case and has a +3 charge. 'Chloro' indicates the presence of a chlorine (Cl) ion within the coordination sphere. The chloride ion is outside the coordination sphere (also carrying a -1 charge). So, the formula is [\(Cr(H2O)_5Cl]Cl_2\).
03

Decipher Tetrabromocuprate(II)

Tetrabromocuprate(II) is a complex ion with copper (Cu) having a +2 charge and four bromine (Br) with a -1 charge each. To ensure neutrality, we need one copper atom and two bromine ions. The formula is \(CuBr_2\).
04

Decipher Ethylenediaminetetraacetatoferrate(II)

Ethylenediaminetetraacetatoferrate(II) denotes a complex ion, where iron (Fe) has a +2 charge. Ethylenediamine (en) and acetate (CH3COO) are both bidentate ligands which bind twice to the central metal atom. There is one ethylenediamine and four acetate ligands. To achieve a neutral molecule, two protons (H+) are required. So the formula is [\(Fe(CH2CH2(NH2)2)C4H3O4]H2\).

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Most popular questions from this chapter

Without referring to the text, write the ground-state electron configurations of the first-row transition metals. Explain any irregularities.

The compound 1,1,1 -trifluoroacetylacetone (tfa) is a bidentate ligand: It forms a tetrahedral complex with \(\mathrm{Be}^{2+}\) and a square planar complex with \(\mathrm{Cu}^{2+}\). Draw structures of these complex ions and identify the type of isomers exhibited by these ions.

What distinguishes a transition metal from a representative metal?

Copper is also known to exist in +3 oxidation state, which is believed to be involved in some biological electron transfer reactions. (a) Would you expect this oxidation state of copper to be stable? Explain. (b) Name the compound \(\mathrm{K}_{3} \mathrm{CuF}_{6}\) and predict the geometry of the complex ion and its magnetic properties. (c) Most of the known Cu(III) compounds have square planar geometry. Are these compounds diamagnetic or paramagnetic?

A solution made by dissolving \(0.875 \mathrm{~g}\) of \(\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{3}\) in \(25.0 \mathrm{~g}\) of water freezes \(0.56^{\circ} \mathrm{C}\) below the freezing point of pure water. Calculate the number of mole of ions produced when 1 mole of \(\mathrm{Co}\left(\mathrm{NH}_{3}\right){ }_{4} \mathrm{Cl}_{3}\) is dissolved in water, and suggest a structure for the complex ion present in this compound.
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