IB Chemistry SL 2.2.5 Bond Polarity Question Bank

Practise IB Chemistry SL 2.2.5 by comparing electronegativities, identifying polar bonds and drawing dipole arrows with the correct charge direction.

Exam points

compare electronegativity values to classify a bond as non-polar or polar covalent
assign δ+ and δ− to the less and more electronegative atoms in a polar bond
annotate a structural formula with bond-dipole direction and partial charges

[Maximum number: 2]

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

7.75 g of phosphorus was combusted in a limited supply of oxygen, the mass of the oxide produced was 13.75 g .

Describe the nature of the bond between oxygen and phosphorus. Use sections 9 and 17 of the data booklet.

$\text { " } 3.4-2.2=1.2,(3.4+2.2) / 2=2.8 \text { " }$

Electronegativity difference is 1.2 .

AND

Average electronegativity is 2.8

polar covalent

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