IB Chemistry HL 3.4.7 Coordination Bond Formation Question Bank

Practise IB Chemistry HL 3.4.7 with questions explaining electron-pair donation from Lewis bases to Lewis acids.

Exam points

identify the ligand or Lewis base that supplies both electrons in the shared pair
identify the Lewis-acid centre accepting the pair to form the coordination bond
draw electron-pair donation from the ligand lone pair towards the accepting centre

[Maximum number: 2]

Urea, $\left(\mathrm{H}_{2} \mathrm{~N}\right)_{2} \mathrm{CO}$ , is excreted by mammals and can be used as a fertilizer.

Describe the bond formation when urea acts as a ligand in a transition metal complex ion.

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