Question 1

The pK_a of hydrated iron(III)is 2.5,and the pK_a of hydrated nickel(II)is 10.0.If 0.1 M solutions of iron(III)nitrate and nickel(II)nitrate are constituted,which one will be the more acidic and why?

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Question 2

Chromium(III)hydroxide shows greater solubility in strongly basic aqueous solutions than in solutions that are weakly basic.Briefly explain why,and show any relevant reactions or equilibria.

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Question 3

Explain why Ni(CN)₄²^- is diamagnetic and NiCl₄²^- is paramagnetic in terms of the possible geometries (tetrahedral and square planar)and the magnitudes of the crystal field splitting.

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Question 4

Choose the complex that you predict will absorb the shortest wavelengths of light from each pair,and briefly explain your choice. (1)Cr(H₂O)₆³⁺ or Cr(NH₃)₆³⁺ (2)NiCl₄^2- or NiI₄^2- (3)Co(CN)₆^4- or Co(CN)₆^3- (3)NiEDTA^2- or NiBr₄^2-

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Question 5

One of the following solutions is acidic.Identify which,explain why,and write an appropriate reaction equation showing the production of hydronium ion. CaCl₂,CrCl₂,MgCl₂,NaClZ

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Question 6

What determines whether a transition metal ion is in a high-spin or a low-spin electron configuration?

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Question 7

What is the molar concentration of silver ion,Ag⁺(aq),in a 1.00 M solution of Ag(NH₃)₂⁺ with no excess ammonia? (K_f = 1.70 $\times$ 10⁷ for Ag(NH₃)₂⁺)

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Question 8

Mixing of aqueous solutions of sodium chloride and mercury(II)nitrate produce a solution that is initially 1.00 $\times$ 10^-3 M Hg²⁺ and 0.200 M Cl^- What is the approximate molar concentration of Hg²⁺ at equilibrium? (K_f = 1.2 $\times$ 10¹⁵ for HgCl₄^2-)

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Question 9

Draw and label the cis and trans isomers of octahedral Ni(H₂O)₄(OH)₂.

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Question 10

Draw and label (cis and trans)the stereoisomers of the square planar complex ion,CuCl₂Br₂²^-.

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Question 11

Unlike most transition metal compounds,those of scandium(III)are colorless.Why?

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Question 12

Give a brief explanation of the thermodynamics of the chelate effect in terms of enthalpy,entropy,and free energy.For example,Co(NH₃)₆³⁺(aq)+ 3 en(aq)$\to$ Co(en)₃³⁺(aq)+ 6 NH₃(aq)is spontaneous.Why?

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Question 13

Why are compounds of most of the first-row transition metals colored?

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Quiz 16: Coordination Compounds-The Colorful Chemistry of Metals

The pK_a of hydrated iron(III)is 2.5,and the pK_a of hydrated nickel(II)is 10.0.If 0.1 M solutions of iron(III)nitrate and nickel(II)nitrate are constituted,which one will be the more acidic and why?

Chromium(III)hydroxide shows greater solubility in strongly basic aqueous solutions than in solutions that are weakly basic.Briefly explain why,and show any relevant reactions or equilibria.

Explain why Ni(CN)₄²^- is diamagnetic and NiCl₄²^- is paramagnetic in terms of the possible geometries (tetrahedral and square planar)and the magnitudes of the crystal field splitting.

Choose the complex that you predict will absorb the shortest wavelengths of light from each pair,and briefly explain your choice. (1)Cr(H₂O)₆³⁺ or Cr(NH₃)₆³⁺ (2)NiCl₄^2- or NiI₄^2- (3)Co(CN)₆^4- or Co(CN)₆^3- (3)NiEDTA^2- or NiBr₄^2-

One of the following solutions is acidic.Identify which,explain why,and write an appropriate reaction equation showing the production of hydronium ion. CaCl₂,CrCl₂,MgCl₂,NaClZ

What determines whether a transition metal ion is in a high-spin or a low-spin electron configuration?

What is the molar concentration of silver ion,Ag⁺(aq),in a 1.00 M solution of Ag(NH₃)₂⁺ with no excess ammonia? (K_f = 1.70 $\times$ 10⁷ for Ag(NH₃)₂⁺)

Mixing of aqueous solutions of sodium chloride and mercury(II)nitrate produce a solution that is initially 1.00 $\times$ 10^-3 M Hg²⁺ and 0.200 M Cl^- What is the approximate molar concentration of Hg²⁺ at equilibrium? (K_f = 1.2 $\times$ 10¹⁵ for HgCl₄^2-)

Draw and label the cis and trans isomers of octahedral Ni(H₂O)₄(OH)₂.

Draw and label (cis and trans)the stereoisomers of the square planar complex ion,CuCl₂Br₂²^-.

Unlike most transition metal compounds,those of scandium(III)are colorless.Why?

Give a brief explanation of the thermodynamics of the chelate effect in terms of enthalpy,entropy,and free energy.For example,Co(NH₃)₆³⁺(aq)+ 3 en(aq) $\to$ Co(en)₃³⁺(aq)+ 6 NH₃(aq)is spontaneous.Why?

Why are compounds of most of the first-row transition metals colored?

Quiz 16: Coordination Compounds-The Colorful Chemistry of Metals

The pKa of hydrated iron(III)is 2.5,and the pKa of hydrated nickel(II)is 10.0.If 0.1 M solutions of iron(III)nitrate and nickel(II)nitrate are constituted,which one will be the more acidic and why?

Chromium(III)hydroxide shows greater solubility in strongly basic aqueous solutions than in solutions that are weakly basic.Briefly explain why,and show any relevant reactions or equilibria.

Explain why Ni(CN)42- is diamagnetic and NiCl42- is paramagnetic in terms of the possible geometries (tetrahedral and square planar)and the magnitudes of the crystal field splitting.

Choose the complex that you predict will absorb the shortest wavelengths of light from each pair,and briefly explain your choice. (1)Cr(H2O)63+ or Cr(NH3)63+ (2)NiCl42- or NiI42- (3)Co(CN)64- or Co(CN)63- (3)NiEDTA2- or NiBr42-

One of the following solutions is acidic.Identify which,explain why,and write an appropriate reaction equation showing the production of hydronium ion. CaCl2,CrCl2,MgCl2,NaClZ

What determines whether a transition metal ion is in a high-spin or a low-spin electron configuration?

What is the molar concentration of silver ion,Ag+(aq),in a 1.00 M solution of Ag(NH3)2+ with no excess ammonia? (Kf = 1.70 ×\times× 107 for Ag(NH3)2+)

Mixing of aqueous solutions of sodium chloride and mercury(II)nitrate produce a solution that is initially 1.00 ×\times× 10-3 M Hg2+ and 0.200 M Cl- What is the approximate molar concentration of Hg2+ at equilibrium? (Kf = 1.2 ×\times× 1015 for HgCl42-)

Draw and label the cis and trans isomers of octahedral Ni(H2O)4(OH)2.

Draw and label (cis and trans)the stereoisomers of the square planar complex ion,CuCl2Br22-.

Unlike most transition metal compounds,those of scandium(III)are colorless.Why?

Give a brief explanation of the thermodynamics of the chelate effect in terms of enthalpy,entropy,and free energy.For example,Co(NH3)63+(aq)+ 3 en(aq) →\to→ Co(en)33+(aq)+ 6 NH3(aq)is spontaneous.Why?

Why are compounds of most of the first-row transition metals colored?

The pK_a of hydrated iron(III)is 2.5,and the pK_a of hydrated nickel(II)is 10.0.If 0.1 M solutions of iron(III)nitrate and nickel(II)nitrate are constituted,which one will be the more acidic and why?

Explain why Ni(CN)₄²^- is diamagnetic and NiCl₄²^- is paramagnetic in terms of the possible geometries (tetrahedral and square planar)and the magnitudes of the crystal field splitting.

Choose the complex that you predict will absorb the shortest wavelengths of light from each pair,and briefly explain your choice. (1)Cr(H₂O)₆³⁺ or Cr(NH₃)₆³⁺ (2)NiCl₄^2- or NiI₄^2- (3)Co(CN)₆^4- or Co(CN)₆^3- (3)NiEDTA^2- or NiBr₄^2-

One of the following solutions is acidic.Identify which,explain why,and write an appropriate reaction equation showing the production of hydronium ion. CaCl₂,CrCl₂,MgCl₂,NaClZ

What is the molar concentration of silver ion,Ag⁺(aq),in a 1.00 M solution of Ag(NH₃)₂⁺ with no excess ammonia? (K_f = 1.70 $\times$ 10⁷ for Ag(NH₃)₂⁺)

Mixing of aqueous solutions of sodium chloride and mercury(II)nitrate produce a solution that is initially 1.00 $\times$ 10^-3 M Hg²⁺ and 0.200 M Cl^- What is the approximate molar concentration of Hg²⁺ at equilibrium? (K_f = 1.2 $\times$ 10¹⁵ for HgCl₄^2-)

Draw and label the cis and trans isomers of octahedral Ni(H₂O)₄(OH)₂.

Draw and label (cis and trans)the stereoisomers of the square planar complex ion,CuCl₂Br₂²^-.

Give a brief explanation of the thermodynamics of the chelate effect in terms of enthalpy,entropy,and free energy.For example,Co(NH₃)₆³⁺(aq)+ 3 en(aq) $\to$ Co(en)₃³⁺(aq)+ 6 NH₃(aq)is spontaneous.Why?