DP Chemistry (last assessment 2024)

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Question 18N.2.hl.TZ0.c

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Date November 2018 Marks available [Maximum mark: 3] Reference code 18N.2.hl.TZ0.c
Level hl Paper 2 Time zone TZ0
Command term Predict Question number c Adapted from N/A
c.
[Maximum mark: 3]
18N.2.hl.TZ0.c

Bromine can form the bromate(V) ion, BrO3−.

Predict, using the VSEPR theory, the geometry of the BrO3− ion and the O−Br−O bond angles.

[3]

Markscheme

Geometry:
trigonal/pyramidal ✔

Reason:
three bonds AND one lone pair
OR
four electron domains ✔

O−Br−O angle:
107° ✔

 

Accept “charge centres” for “electron domains”.

Accept answers in the range 104–109°.

Syllabus sections