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D2.3 Water potential

Water potential explains osmosis, solute effects, plant tissue changes, cell swelling, plasmolysis and isotonic medical conditions in living systems and cells.

Syllabus
First assessment 2025
Topic
D2.3
Level
—

What you’ll learn

11 learning objectives

Choose one objective for a focused lesson, or study the complete topic.

Exam analysis

An aggregate view of how the complete D2.3 Water potential appears across past papers.

Chance of appearing15%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper3

Most tested objectives

  1. D2.3.5—Effects on cells without wall18 questions
  2. D2.3.4—Changes in plant tissue14 questions
  3. D2.3.2—Water movement7 questions

Common question formats

  • Definition or recall
  • Process explanation
  • Calculation
  • Data analysis
  • Diagram interpretation

Exam question appearances

November 2025Paper2 ["HL"] · TZ19(c)[ 4 ]D2.3.7—Medical applications
November 2025Paper2 ["HL"] · TZ34(a)[ 3 ]D2.3.10 (HL)—Solute and pressure potential
November 2025Paper1A ["HL"] · TZ120[ 1 ]D2.3.10 (HL)—Solute and pressure potential
November 2025Paper1A ["SL"] · TZ112[ 1 ]D2.3.5—Effects on cells without wall
May 2025Paper2 ["SL"] · TZ16(c)[ 7 ]D2.3.6—Effects on cells with wall

Coverage 2015–2025 · Updated 16 Jul 2026

Study checklistD2.3 Water potential