IB Chemistry SL 2.2.5 Bond Polarity

Practise using electronegativity differences to decide whether a covalent bond is polar and which end carries each partial charge. Read data-booklet values, calculate the…

Syllabus
First assessment 2025
Objective
2.2.5
Level
SL

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

2.2.5—Bond polarity question 1

[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.

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