Coordination Chemistry Quiz

Write the missing word in this definition of a ligand:

Ligand is a molecule or ion that can donate a pair of electrons to a central metal ion/atom to form a ................................. bond (also called dative).

Match the key word with its description

• donate 1 pair of electrons

• coordination number

• shape for coordination number 4

• tetrahedral

• donate 2 pairs of electrons

• octahedral

• shape for coordination number 6

• monodentate ligand

• total number of coordinate bonds

• bidentate ligand

Organize these options into the right categories

Groups:

(a) Bidentate ligands

,

(b) Monodentate ligands

• OH^-

• Cl^-

• 
• 
• NH₃

• CN^-

• 
• 

What is the coordination number in [Ni(NH₂CH₂CH₂NH₂)₃]²⁺?

• 10
• 8
• 6
• 4

State the shape around the central ion in [Cr(NH₃)₆]³⁺

• octahedral
• tetrahedral
• square planar
• trigonal bipyramidal

What is the shape, bond angle, and coordination number in [Cu(Cl)₄]^2-

• Trigonal bipyramidal, 120 degrees, coordination number 5
• Square planar, 90 degrees, coordination number 4
• Octahedral, 90 degrees, coordination number 6
• Tetrahedral, 109.5 degrees, coordination number 4

What is the charge/oxidation number of the metal in [Pt(NH₃)₃Cl]⁺

• +1
• +3
• 0
• +2

What is the charge / oxidation number of the metal in [Cr(H₂O)₄Cl₂]⁺

• +1
• +2
• +4
• +3

What is the formula of the complex ion containing Cu²⁺ and 6 F^- ligands?

Answer explanation

[CuF₆]^4-

What is the formula of the complex ion containing Co³⁺, 4 NH₃, and 2 Cl^- ligands?

Answer explanation

[Co(NH₃)₄Cl₂]⁺