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IB Chemistry HL 2.1 The Ionic Model Questions

Practise ion formation, charge-balanced formulae and how ionic lattices account for bonding, conductivity and other material properties in IB Chemistry 2.1.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • Predict electron transfer and the charge formed when metals lose or non-metals gain electrons.
  • Deduce names and neutral formulae by balancing monatomic or polyatomic ion charges.
  • Describe ionic attraction and distinguish it from covalent bonds within polyatomic ions.
  • Represent giant ionic lattices and explain melting, brittleness and conductivity from ion arrangement and mobility.
  • Compare ionic and molecular substances using their solubility and structure-property evidence.

Covered syllabus points

2.1.1—Ion formation2.1.2—Ionic bonding2.1.3—Ionic compounds

Question 1

[Maximum number: 1]

Titanium and vanadium are consecutive elements in the first transition metal series.

State the type of bonding in potassium chloride which melts at 1043 K .

Question 2

[Maximum number: 3]

Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds.

Question (a)

(a)

In addition to magnesium oxide, magnesium forms another compound when burned in air. Suggest the formula of this compound.

[ 1 ]

Question (b)

(b)

Describe the structure and bonding in solid magnesium oxide.

[ 2 ]

Question 3

[Maximum number: 4]

Aluminium chloride, Al2Cl6\mathrm{Al}_{2} \mathrm{Cl}_{6}, does not conduct electricity when molten but aluminium oxide, Al2O3\mathrm{Al}_{2} \mathrm{O}_{3}, does. Explain this in terms of the structure and bonding of the two compounds.
Al2Cl6\mathrm{Al}_{2} \mathrm{Cl}_{6} : Al2O3\mathrm{Al}_{2} \mathrm{O}_{3} :

Question 4

[Maximum number: 2]

Magnesium is a group 2 metal which exists as a number of isotopes and forms many compounds.

Describe the structure and bonding in solid magnesium oxide.

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