DP Chemistry (last assessment 2024)

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Question 17N.2.hl.TZ0.a

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Date November 2017 Marks available [Maximum mark: 6] Reference code 17N.2.hl.TZ0.a
Level hl Paper 2 Time zone TZ0
Command term Deduce, Draw Question number a Adapted from N/A
a.
[Maximum mark: 6]
17N.2.hl.TZ0.a

Lewis (electron dot) structures are useful models.

Draw the Lewis (electron dot) structures of PF3 and PF5 and use the VSEPR theory to deduce the molecular geometry of each species including bond angles.

[6]

Markscheme

 

Accept any combination of dots, crosses and lines.

Penalize missing lone pairs once only.

Do not apply ECF for molecular geometry.

Accept values in the range 95–109 for PF3.

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