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Course: Biology library > Unit 11

Lesson 2: Transport
Science
Biology library
More about membranes
Transport
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Mechanisms of transport: tonicity and osmoregulation

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Problem

A group of biology students weighed several potato cubes and placed them in open beakers containing various sucrose solutions at 30∘C. The following day, the students weighed the potato cubes again and calculated the differences in mass.
It was determined that solute potential equilibrium was reached at 0.35M.
Solute potential of a solution: ψs=−iCRT
  • i= ionization constant (1.0 for sucrose)
  • C= molar concentration
  • R= pressure constant (0.0831L⋅bar⋅mol−1⋅K−1)
  • T= temperature in Kelvin (∘C of solution +273)
What is the solute potential of the potato cubes?
Choose 1 answer: