IB Chemistry SL 2.2.5 Bond Polarity Questions

Use exam questions to classify polar bonds, compare electronegativity differences and annotate δ+ and δ− dipoles.

Exam points

Compare electronegativity values or differences to classify a covalent bond as non-polar or polar and justify the classification.
Assign δ+ to the less electronegative atom and δ− to the more electronegative atom in a polar bond.
Annotate a structural formula with bond-dipole direction and partial charges for each relevant polar bond.

[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

All question bank results loaded