Kafli 19 - Svör við æfingum

Svör við æfingum

19.1 Tilvist, framleiðsla og eiginleikar hliðarmálma og efnasambanda þeirra

(a) Sc: [Ar]4s²3d¹; (b) Ti: [Ar]4s²3d²; (c) Cr: [Ar]4s¹3d⁵; (d) Fe: [Ar]4s²3d⁶; (e) Ru: [Kr]5s²4d⁶

(a) La: [Xe]6s²5d¹, La³⁺: [Xe]; (b) Sm: [Xe]6s²4f⁶, Sm³⁺: [Xe]4f⁵; (c) Lu: [Xe]6s²4f¹⁴5d¹, Lu³⁺: [Xe]4f¹⁴

Al er notað vegna þess að það er sterkasti afoxarinn og eini kosturinn á listanum sem getur veitt nægjanlegan drifkraft til að breyta La(III) í La.

Mo

CaSiO₃ gjallið er með minni eðlismassa en bráðið járn, svo auðvelt er að skilja það frá. Einnig myndar fljótandi gjalllagið hindrun sem kemur í veg fyrir að bráðið járn komist í snertingu við O₂, sem myndi oxa Fe aftur í Fe₂O₃.

2,57%

0,167 V

E = −0,6 V, E er neikvætt svo þessi afoxun er ekki sjálfgeng. E = +1,1 V

(a) ${\text{Fe}(s)+2{\text{H}}_{3}{\text{O}}^{\text{+}}(aq)+{{\text{SO}}}_{4}^{{2−}}(aq)\, \longrightarrow \, {{\text{Fe}}}^{{2+}}(aq)+{{\text{SO}}}_{4}^{{2−}}(aq)+{\text{H}}_{2}(g)+2{\text{H}}_{2}\text{O}(l);}$ (b) ${{{\text{FeCl}}}_{3}(aq)+{{\text{3Na}}}^{\text{+}}(aq)+{{\text{3OH}}}^{\text{−}}(aq)\, \longrightarrow \text{Fe}{{(\text{OH})}}_{3}(s)+{{\text{3Na}}}^{\text{+}}(aq)+{{\text{3Cl}}}^{\text{+}}(aq);}$ (c) ${\text{Mn}{{(\text{OH})}}_{2}(s)+2{\text{H}}_{3}{\text{O}}^{\text{+}}(aq)+{{\text{2Br}}}^{\text{−}}(aq)\, \longrightarrow \, {{\text{Mn}}}^{{2+}}(aq)+{{\text{2Br}}}^{\text{−}}(aq)+4{\text{H}}_{2}\text{O}(l);}$ (d) ${\text{4Cr}(s)+3{\text{O}}_{2}(g)\, \longrightarrow \, 2{{\text{Cr}}}_{2}{\text{O}}_{3}(s);}$ (e) ${{{\text{Mn}}}_{2}{\text{O}}_{3}(s)+6{\text{H}}_{3}{\text{O}}^{\text{+}}(aq)+{{\text{6Cl}}}^{\text{−}}(aq)\, \longrightarrow \, 2{{\text{MnCl}}}_{3}(s)+9{\text{H}}_{2}\text{O}(l);}$ (f) ${\text{Ti}(s)+xs{\text{F}}_{2}(g)\, \longrightarrow \, {{\text{TiF}}}_{4}(g)}$

(a) ${{\text{Cr}}}_{{2}}{({\text{SO}}{4})}{3}(aq)+\text{2Zn}(s)+{\text{2H}}_{3}{\text{O}}^{\text{+}}(aq)\, \longrightarrow \, {\text{2Zn}}^{{2+}}(aq)+{\text{H}}_{2}(g)+{\text{2H}}_{2}\text{O}(l)+{\text{2Cr}}^{{2+}}(aq)+{\text{3SO}}_{4}^{{2−}}(aq);$ (b) ${{{\text{4TiCl}}}_{3}(s)+{{\text{CrO}}}_{4}^{{2−}}(aq)+{\text{8H}}^{\text{+}}(aq)\, \longrightarrow \, {{\text{4Ti}}}^{{4+}}(aq)+\text{Cr}(s)+{\text{4H}}_{2}\text{O}(l)+{{\text{12Cl}}}^{\text{−}}(aq);}$ (c) Í súrri lausn með pH á milli 2 og 6 myndar ${{{\text{CrO}}}_{4}^{{2−}}}$ ${{{\text{HCrO}}}_{4}^{\text{−}},}$ sem er í jafnvægi við díkrómatjónina. Efnahvarfið er ${{{\text{2HCrO}}}_{4}^{\text{−}}(aq)\, \longrightarrow \, {{\text{Cr}}}_{2}{\text{O}}_{7}^{{2−}}(aq)+{\text{H}}_{2}\text{O}(l).}$ Við önnur súr pH-gildi er efnahvarfið ${{{\text{3Cr}}}^{{2+}}(aq)+{{\text{CrO}}}_{4}^{{2−}}(aq)+{\text{8H}}_{3}{\text{O}}^{\text{+}}(aq)\, \longrightarrow \, {{\text{4Cr}}}^{{3+}}(aq)+{\text{12H}}_{2}\text{O}(l);}$ (d) ${{{\text{8CrO}}}_{3}(s)+\text{9Mn}(s)\, \overset{\text{Δ}}{\longrightarrow}\, {{\text{4Cr}}}_{2}{\text{O}}_{3}(s)+{{\text{3Mn}}}_{3}{\text{O}}_{4}(s);}$ (e) ${\text{CrO}(s)+{\text{2H}}_{3}{\text{O}}^{\text{+}}(aq)+{{\text{2NO}}}_{3}^{\text{−}}(aq)\, \longrightarrow \, {{\text{Cr}}}^{{2+}}(aq)+{{\text{2NO}}}_{3}^{\text{−}}(aq)+{\text{3H}}_{2}\text{O}(l);}$ (f) ${{{\text{CrCl}}}_{3}(s)+\text{3NaOH}(aq)\, \longrightarrow \, \text{Cr}{{(\text{OH})}}_{3}(s)+{{\text{3Na}}}^{\text{+}}(aq)+{{\text{3Cl}}}^{\text{−}}(aq)}$

(a) ${\text{3Fe}(s)+{\text{4H}}_{2}\text{O}(g)\, \longrightarrow \, {{\text{Fe}}}_{3}{\text{O}}_{4}(s)+{\text{4H}}_{2}(g);}$ (b) ${\text{3NaOH}(aq)+\text{Fe}{({\text{NO}}3)}3(aq)\, \overset{{\, {{\text{H}}}_{{2}}\text{O}\,}}{\rightarrow}\, \text{Fe}{{(\text{OH})}}_{3}(s)+{{\text{3Na}}}^{\text{+}}(aq)+3{{\text{NO}}}_{3}^{\text{−}}(aq);}$ (c) $\text{MnO}^{{4−}}+5{\text{Fe}}^{\text{2+}}+8{\text{H}}^{{\text{+}}}\, \longrightarrow \, \text{Mn}^{\text{2+}}+5{\text{Fe}}_{3}+4{\text{H}}_{2}\text{O};$ (d) ${\text{Fe}(s)+{\text{2H}}_{3}{\text{O}}^{\text{+}}(aq)+{{\text{SO}}}_{4}^{{2−}}(aq)\, \longrightarrow \, {{\text{Fe}}}^{{2+}}(aq)+{{\text{SO}}}_{4}^{{2−}}(aq)+{\text{H}}_{2}(g)+{\text{2H}}_{2}\text{O}(l);}$ (e) ${{{\text{4Fe}}}^{{2+}}(aq)+{\text{O}}_{2}(g)+{{\text{4HNO}}}_{3}(aq)\, \longrightarrow \, {{\text{4Fe}}}^{{3+}}(aq)+{\text{2H}}_{2}\text{O}(l)+{{\text{4NO}}}_{3}^{\text{−}}(aq);}$ (f) ${{{\text{FeCO}}}_{3}(s)+{{\text{2HClO}}}_{4}(aq)\, \longrightarrow \, \text{Fe}{({\text{ClO}}4)}2(aq)+{\text{H}}_{2}\text{O}(l)+{{\text{CO}}}_{2}(g);}$ (g) ${\text{3Fe}(s)+{\text{2O}}_{2}(g)\, \overset{{\, \text{Δ}\,}}{{\longrightarrow}}\, {{\text{Fe}}}_{3}{\text{O}}_{4}(s)}$

Þegar CN⁻ er bætt við,
${{{\text{Ag}}}^{\text{+}}(aq)+{{\text{CN}}}^{\text{−}}(aq)\, \longrightarrow \, \text{AgCN}(s)}$
Þegar meira CN⁻ er bætt við,
$\begin{aligned} {\text{Ag}}^{\text{+}}(aq)+2{\text{CN}}^{\text{−}}(aq)\, \longrightarrow \, {{[\text{Ag}{{\text{(CN)}}}_{{2}}]}}^{{\text{−}}}(aq) \\ \text{AgCN}(s)+{\text{CN}}^{\text{−}}(aq)\, \longrightarrow \, {{[\text{Ag}{{\text{(CN)}}}_{{2}}]}}^{{\text{−}}}(aq) \end{aligned}$

(a) Sc³⁺; (b) Ti⁴⁺; (c) V⁵⁺; (d) Cr⁶⁺; (e) Mn⁴⁺; (f) Fe²⁺ og Fe³⁺; (g) Co²⁺ og Co³⁺; (h) Ni²⁺; (i) Cu⁺

19.2 Girðiefnafræði hliðarmálma

(a) 4, [Zn(OH)₄]²⁻; (b) 6, [Pd(CN)₆]²⁻; (c) 2, [AuCl₂]⁻; (d) 4, [Pt(NH₃)₂Cl₂]; (e) 6, K[Cr(NH₃)₂Cl₄]; (f) 6, [Co(NH₃)₆][Cr(CN)₆]; (g) 6, [Co(en)₂Br₂]NO₃

(a) [Pt(H₂O)₂Br₂]:

(b) [Pt(NH₃)(py)(Cl)(Br)]:

(c) [Zn(NH₃)₃Cl]⁺ :

(d) [Pt(NH₃)₃Cl]⁺ :

(e) [Ni(H₂O)₄Cl₂]:

(f) [Co(C₂O₄)₂Cl₂]³⁻:

Two structures are shown. At the center of each is a P t atom. The structure on the left is labeled, “cis.” From this atom, a single bond represented by a dashed wedge extends from a vertex at the P t atom up and to the right to a B r atom. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the right to a second B r atom. Another single bond represented by a dashed wedge extends from a vertex at the P t atom up and to the left to the O atom of an H subscript 2 O group. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the left to a second O atom of an H subscript 2 O group. The structure on the right is labeled, “trans.” From the central P t atom, a single bond represented by a dashed wedge extends from a vertex at the P t atom up and to the right to a B r atom. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the right to the O atom of an H subscript 2 O group. Another single bond represented by a dashed wedge extends from a vertex at the P t atom up and to the left to the O atom of a second H subscript 2 O group. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the left to a second B r atom.;

Three structures are shown. At the center of each is a P t atom. From this atom in the first structure on the left, a single bond represented by a dashed wedge extends from a vertex at the P t atom up and to the right to a C l atom. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the right to the N atom of an N H subscript 3 group. Another single bond represented by a dashed wedge extends from a vertex at the P t atom up and to the left to a B r atom. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the left to p y. The middle structure shows a single bond represented by a dashed wedge extending from a vertex at the P t atom up and to the right to a B r atom. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the right to the N atom of an N H subscript 3 group. Another single bond represented by a dashed wedge extends from a vertex at the P t atom up and to the left to p y. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the left to a to a C l atom. The third structure shows a single bond represented by a dashed wedge extending from a vertex at the P t atom up and to the right to p y. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the right to the N atom of an N H subscript 3 group. Another single bond represented by a dashed wedge extends from a vertex at the P t atom up and to the left to a C l atom. Similarly, a single bond represented by a solid wedge extends from a vertex at the P t atom down and to the left to a B r atom.;

Inside of brackets, a central Z n atom is bonded to a C l atom and three N atoms in N H subscript 3 groups in a tetrahedral spatial arrangement. Short line segments are used to represent a bond extending above to the C l atom and down and to the left to the N of the N H subscript 3 group from the Z n atom. A dashed wedge with the vertex at the Z n atom and wide end at the N atom of an N H subscript 3 group is used to represent a bond down and to the right of the Z n atom. The final bond is indicated by a similar solid wedge again directed down and only slightly right of center beneath the Z n atom to the N of an N H subscript 3 group. Outside the brackets a superscript plus sign is shown.;

This structure shows a single bond represented by a dashed wedge extending from a vertex at the P t atom up and to the right to the N atom of an N H subscript 3 group. Similarly, two single bonds represented by solid wedges extend from vertices at the P t atom down and to the right and down and to the left to the N atoms of N H subscript 3 groups. Another single bond represented by a dashed wedge extends from a vertex at the P t atom up and to the left to a C l atom. This structure is enclosed in brackets with superscript plus sign appearing to the right of the brackets.;

Two structures are shown. The first is labeled, “trans.” Below this label inside brackets is a central N i atom. From the N i atom, line segments indicate bonds to C l atoms above and below. Above and to both the right and left, dashed wedges with their vertex at the N i atom widening as they move out from the atom indicate bonds with O atoms of H subscript 2 O groups. Similarly, solid wedges below to both the right and left indicate bonds to the O atoms of H subscript 2 O groups. This structure is enclosed in brackets. The second structure is labeled, “cis.” Inside brackets is a central N i atom. From the N i atom, line segments indicate bonds to a C l atom above and the O atom of an H subscript 2 O group below. Above and to both the right and left, dashed wedges indicate bonds with O atoms of H subscript 2 O groups. Similarly, a solid wedge below to the right indicates a bond with a C l atom and a solid wedge to the lower left indicates a bond to the O atoms of an H subscript 2 O group. This structure is also enclosed in brackets.;

This figure includes three structures. The first structure includes a central C o atom that has four O atoms and two C l atoms attached with single bonds. These bonds are indicated with line segments extending above and below, dashed wedges extending up and to the left and right, and solid wedges extending below and to the left and right. C l atoms are bonded at the top and at the upper left of the structure. The remaining four bonds extend from the central C o atom to O atoms. The O atoms are each connected to C atoms which are each connected with double bonds to O atoms extending outward from the central C o atom. These C atoms are connected in pairs with bonds indicated by short line segments, forming two rings in the structure. This entire structure is enclosed in brackets. Outside the brackets to the right is a superscript 3 negative sign. The second structure, which appears to the be mirror image of the first structure, includes a central C o atom that has four O atoms and two C l atoms attached with single bonds. These bonds are indicated with line segments extending above and below, dashed wedges extending up and to the left and right, and solid wedges extending below and to the left and right. C l atoms are bonded at the top and at the upper right of the structure. The remaining four bonds extend from the central C o atom to O atoms. The O atoms are each connected to C atoms which are each connected with double bonds to O atoms extending outward from the central C o atom. These C atoms are connected in pairs with bonds indicated by short line segments, forming two rings in the structure. This entire structure is enclosed in brackets. Outside the brackets to the right is the superscript 3 negative sign. The third structure includes a central C o atom that has four O atoms and two C l atoms attached with single bonds. These bonds are indicated with line segments extending above and below, dashed wedges extending up and to the left and right, and solid wedges extending below and to the left and right. C l atoms are bonded at the top and bottom of the structure. The remaining four bonds extend from the central C o atom to the O atoms. The O atoms are each connected to C atoms which are in turn each double bonded to O atoms extending outward from the central C o atom. These C atoms are connected in pairs with bonds indicated by short line segments, forming two rings in the structure. This entire structure is enclosed in brackets. Outside the brackets, to the right, is a superscript 3 negative sign. This final structure has rings of atoms on opposite sides of the structure.

(a) tríkarbónatócóbaltat(III)jón; (b) tetraammínkopar(II)jón; (c) tetraammíndíbrómócóbalt(III)súlfat; (d) tetraammínplatína(II)tetraklóróplatinat(II); (e) tris-(etýlendíamín)króm(III)nítrat; (f) díammíndíbrómópalladíum(II); (g) kalíumpentaklórókúprat(II); (h) díammíndíklórósink(II)

(a) engar; (b) engar; (c) Tveir Cl-ligandar geta verið cis eða trans. Þegar þeir eru cis verður einnig til handhverf ísómera.

This figure shows eight structures, each inside brackets in three rows. The first row contains three structures, the second row contains three structures, and the third row contains two structures. These structures are described in increasing order moving left to right and top to bottom in the figure. Each includes a central C o atom with line segments indicating bonds above and below the central atom. Above and to both the left and right, dashed wedges with vertices at the C o atom widening as they move out from the atom indicates single bonds. Similarly, solid wedges below and to both the left and right indicate single bonds. Outside each structure in brackets, to the right, an element or group is identified in brackets as a superscript. In the first structure, the C atom of a C N group is bonded to the C o atom. All 5 remaining bonds are with C l atoms. C N appears in brackets as a superscript outside the structure. In the second structure, the N atom of a C N group is bonded to the C o atom. All 5 remaining bonds are with C l atoms. C N appears in brackets as a superscript outside the structure. In the third structure, the C atom of two C N groups are bonded to the C o atom at the top and bottom of the structure. All 4 remaining bonds are with C l atoms. C l appears in brackets as a superscript outside the structure. In the fourth structure, the C atom of a C N groups is bonded to the C o atom at the top and the N atom of a C N group which is bonded at the bottom of the structure. All 4 remaining bonds are with C l atoms. C l appears in brackets as a superscript outside the structure. In the fifth structure, the N atom of two C N groups are bonded to the C o atom at the top and bottom of the structure. All 4 remaining bonds are with C l atoms. C l appears in brackets as a superscript outside the structure. In the sixth structure, the C atom of two C N groups are bonded to the C o atom at the top and upper right of the structure. All 4 remaining bonds are with C l atoms. C l appears in brackets as a superscript outside the structure. In the seventh structure, the C atom of a C N group is bonded to the C o atom at the top of the structure and the N atom of a C N group is bonded at the upper right of the structure. All 4 remaining bonds are with C l atoms. C l appears in brackets as a superscript outside the structure. In the eighth structure, the N atom of two C N groups are bonded to the C o atom at the top and upper right of the structure. All 4 remaining bonds are with C l atoms. C l appears in brackets as a superscript outside the structure.

19.3 Litrófs- og segulfræðilegir eiginleikar hnitflóka

A diagram is shown with two columns and two rows of squares outlined in yellow. The first column is labeled “[ F e ( N O subscript 2 ) subscript 6 ] superscript 4 negative sign.” The second is labeled, “[ F e F subscript 6 ] superscript 3 negative sign.” In the left column, three linked squares outlined in yellow are shown. Each of the squares contains two half arrows, one pointing up and one pointing down. In a row just above, two empty linked squares are shown. The label, “Low spin, diamagnetic, P less than capital delta subscript oct,” is provided below the column. In the right column, three linked squares outlined in yellow are shown. The square on the left contains two half arrows, one pointing up and one pointing down. The other two squares each contain a single upward pointing half arrow. In a row just above, two linked squares are shown which each contain a single upward pointing half arrow. The label, “High spin, paramagnetic, P greater than capital delta subscript oct,” is provided below the column.

[Co(H₂O)₆]Cl₂ með þremur ópöruðum rafeindum.

(a) 4; (b) 2; (c) 1; (d) 5; (e) 0

(a) [Fe(CN)₆]⁴⁻; (b) [Co(NH₃)₆]³⁺; (c) [Mn(CN)₆]⁴⁻

Flókinn hefur engar óparaðar rafeindir. Flókinn hefur engar rúmhverfur, en spegilmyndin er ekki yfirlögganleg, svo hann hefur ljóshverfu.

Nei. Au⁺ hefur fullskipað 5d undirhvolf.