Coordination Compounds Quiz

What is the coordination number of an electron acceptor in an addition reaction?

• Increases

• Unchanged

• Decreases

• Changes in oxidation state

What are complexes that undergo substitution reaction at room temperature called?

• Kinetically labile

• Kinetically inert

• Stable

• Unstable

What happens to the coordination number in a dissociation reaction?

• Increases

• Unchanged

• Decreases

• Changes in oxidation state

What is the effect of excess ammonia on aqueous solution of copper(II) salts?

• Forms [Cu(NH3)4]2+

• Forms [Cu(H2O)6]2+

• Forms [Cu(H2O)2(NH3)4]2+

• No reaction

What is the typical pH for the formation of a neutral complex from [Cu(H2O)6]2+?

• pH 4

• pH 5

• pH 6

• pH 7

What is the role of charcoal in the preparation of Co(III) complexes?

• Acts as a catalyst

• Acts as a reducing agent

• Acts as a solvent

• No role

What is the expected melting point of a pure compound?

• Sharp

• Broad

• Variable

• Unpredictable

What is the purpose of microanalysis in characterization techniques?

• Determine the melting point

• Determine the percentages of elements

• Measure conductivity

• Analyze infrared spectrum

What does the molar ionic conductance measure?

• Conductance of 1 mole of ions

• Melting point of a compound

• Purity of a compound

• Elemental composition

What is the absorption frequency for free CO32-?

• 890 cm-1

• 850 cm-1

• 830 cm-1

• 700 cm-1