Models of Bonding & Structure B.2 The Covalent Model (id: 68d6d6aca)

本题目来源于试卷: Models of Bonding & Structure B.2 The Covalent Model，类别为 IB化学

[填空题]
Phosphorus reacts with oxygen to form two different oxides, phosphorus(III) oxide ($P_4{O}_6$) and phosphorus(VI) oxide ($P_4{O}_{10}$)

1.The oxides of phosphorus consist of cage-like molecules with the following structural formulas.

The O−P−O bond angles in the two molecules are labelled.
1.State the geometries of the bonds around each phosphorus atom in $P_4{O}_6$   
2.State the geometries of the bonds around each phosphorus atom in $P_4{O}_{10}$   
3.Suggest why the bond O−P−O bond angles of the two molecules are similar despite the different arrangements of bonding and non-bonding electrons around the phosphorus atoms.
4.Explain how the ability of phosphorus to form both $P_4{O}_6$ and $P_4{O}_{10}$ demonstrates that the octet rule is not always obeyed.
2.$P_4{O}_6$ and $P_4{O}_{10}$ react with an aqueous base to produce phosphite ($HP{O}_3^{2-}$) and phosphate ($P{O}_4^{3+}$) ions, respectively. The structural formulas of $HP{O}_3^{2-}$ and $P{O}_4^{3+}$ are shown.

State why resonance structures are needed to accurately represent the bonding in $HP{O}_3^{2-}$ and $P{O}_4^{3+}$.

参考答案:
空格1: trigonal pyramidal  空格2: tetrahedral 


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