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Question 18

This question is about molecular structure, bonding, and intermolecular forces.

1.

Draw a diagram to show the strongest type of interaction between two molecules of propan-1-ol (C3H7OH\text{C}_3\text{H}_7\text{OH}C3​H7​OH) in the liquid phase. Include all lone pairs and partial charges in your diagram.

[3]
2.

Methoxyethane (CH3OCH2CH3\text{CH}_3\text{OCH}_2\text{CH}_3CH3​OCH2​CH3​) is an isomer of propan-1-ol. Table 1 shows the boiling points of propan-1-ol and methoxyethane.

Table 1

CompoundBoiling point / ∘C\text{}^\circ\text{C}∘C
propan-1-ol97
methoxyethane7

In terms of the intermolecular forces involved, explain the difference in boiling points.

[3]
3.

Draw the shape of the SO2Cl2\text{SO}_2\text{Cl}_2SO2​Cl2​ molecule and the shape of the XeF4\text{XeF}_4XeF4​ molecule. Include any lone pairs of electrons that influence the shapes.

In a SO2Cl2\text{SO}_2\text{Cl}_2SO2​Cl2​ molecule, each oxygen atom is attached to the sulfur atom by a double bond that uses two electrons from sulfur.

Name each shape.

Suggest a value for the bond angle in XeF4\text{XeF}_4XeF4​.

Name of shape of SO2Cl2\text{SO}_2\text{Cl}_2SO2​Cl2​: ______________

Name of shape of XeF4\text{XeF}_4XeF4​: ______________

Bond angle in XeF4\text{XeF}_4XeF4​: ______________

[5]
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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