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D2.3.10 (HL)—Solute and pressure potential

Water potential equals solute potential plus pressure potential, combining negative solute effects and positive pressure effects in plant cells and tissues.

Syllabus
First assessment 2025
Objective
D2.3.10
Level
HL

Exam analysis

Chance of appearing3%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1A
Typical marks1–3

Common command terms

  • Explain

Recent exam appearances

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
May 2025Paper1A ["HL"] · TZ320[ 1 ]D2.3.10 (HL)—Solute and pressure potential
Practice this objective

Coverage 2025–2025 · Updated 16 Jul 2026

Concept essentials

  • Water potential equals solute potential plus pressure potential.
  • Solute potential is zero or negative.
  • Pressure potential can become positive in turgid plant cells.
  • Water entry can make pressure potential more positive and solute potential less negative.
ConceptIB Biology HL