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Question 12

This question is about bromine and its compounds.

a.

Give an equation to show how bromine forms an acidic solution in water.

[1]
b.

Give an equation for the reaction between bromine and cold, dilute aqueous sodium hydroxide.

[1]
c.

In acidic conditions, BrO3−\text{BrO}_3^-BrO3−​ ions oxidise Br−\text{Br}^-Br− ions to form Br2\text{Br}_2Br2​.

  • Deduce a half-equation for the oxidation of Br−\text{Br}^-Br− to Br2\text{Br}_2Br2​.
  • Deduce a half-equation for the reduction of BrO3−\text{BrO}_3^-BrO3−​ to Br2\text{Br}_2Br2​.
  • Deduce the overall equation for this reaction.
[3]
d.

Give the equation for the reaction of solid sodium fluoride with concentrated sulfuric acid. State the role of the fluoride ions in this reaction.

[2]
e.

Draw the shape of the I3−\text{I}_3^-I3−​ ion. Include any lone pairs of electrons on the central atom that influence the shape.

[1]
f.

Bromine forms an ion with the Group 13 (Group 3) element indium (In\text{In}In). State and explain the bond angle in InBr2+\text{InBr}_2^+InBr2+​.

[2]
Markscheme

Bonding Questions

  1. A Level
  2. /Chemistry
  3. /Bonding

54 exam-style questions on AQA A Level Chemistry Bonding, covering Ionic bonding, Nature of covalent and dative covalent bonds, Metallic bonding, Bonding and physical properties, Shapes of simple molecules and ions, Bond polarity, and Forces between molecules. Each one has a worked solution and a mark scheme showing where the marks go.

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