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Edexcel A-Level Chemistry AS 7.6 Factors That Influence the Choice of Solvents Questions

Match solute attractions to the solvent, orient water dipoles correctly around ions and use density or layer data only when an extraction context supplies it.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
AS

Exam points

  • Draw hydration with oxygen toward cations and hydrogen toward anions, then name ion-dipole attraction.
  • Explain alcohol or ionic-solute water solubility through hydrogen bonding or hydration.
  • Choose a non-aqueous solvent by matching attractions and interpret extraction-layer density.

Edexcel A-Level Chemistry AS 7.6 Factors That Influence the Choice of Solvents Questions question 1

[Maximum number: 3]

This question is about alcohols with the molecular formula C6H14O\mathrm{C}_{6} \mathrm{H}_{14} \mathrm{O}.

Two primary C6H14O\mathrm{C}_{6} \mathrm{H}_{14} \mathrm{O} alcohols, A and B, are shown.

alcohol A

alcohol A

Figure for Question Edexcel A-Level Chemistry AS 7.6 Factors That Influence the Choice of Solvents Questions question 1 — Edexcel A-Level Chemistry AS

Explain why alcohol B is completely soluble in ethanol but only slightly soluble in water.
A detailed description of the forces involved is not required.

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