IB Chemistry SL 3.1.4 Group Trends

Practise predicting chemical behaviour down Groups 1 and 17 from metallic or non-metallic character. Compare reaction vigour, decide whether a halogen displaces a halide and…

Syllabus
First assessment 2025
Objective
3.1.4
Level
SL

Exam points

  • predict changes in Group 1 reaction vigour or Group 17 oxidising strength
  • decide whether a halogen will oxidise a given halide from relative group position
  • write the displacement equation and state the colour change caused by the product

3.1.4—Group trends question 1

[Maximum number: 2]

Chlorine occurs in Group 7, the halogens.

Question (a)

(a)

Chlorine has an electronegativity value of 3.2 on the Pauling scale.

[ 2 ]

Question (i)

(i)

State the balanced chemical equation for the reaction of potassium bromide, KBr(aq), with chlorine, Cl2(aq)\mathrm{Cl}_{2}(\mathrm{aq}).

[ 1 ]

Question (ii)

(ii)

Describe the colour change likely to be observed in this reaction.

[ 1 ]
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