IB Chemistry SL 2.2.3 Coordination Bonds Question Bank

Practise IB Chemistry SL 2.2.3 by identifying coordinate bonds and explaining how a donor atom supplies both electrons to a shared pair in molecular ions.

Exam points

identify the specific coordination bond in a displayed molecule, ion or complex
state which atom donates the lone pair that becomes the shared bonding pair
distinguish a coordination bond from ionic attraction or an intermolecular force

[Maximum number: 2]

Phosphorus is an element that is an essential part of the biological molecules involved in both respiration and photosynthesis.

Another compound of phosphorus is phosphine, $\mathrm{PH}_{3}$ , it forms a phosphonium ion, $\mathrm{PH}_{4}^{+}$ .

State the types of bonds present in the phosphonium ion, $\mathrm{PH}_{4}{ }^{+}$ , and explain how these bonds are formed.

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2.2.3—Coordination bonds question 1