WATER POTENTIAL

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    • The concentration of free water molecules is heavily influenced by solute concentration.
    • This leads to the concept of water potential.
    • The unit for water potential is the kilopascal, kPa.
    • Pure water has a water potential of 0 kPa.
  • Adding solute to water makes the water potential lower: it becomes negative e.g. -20 kPa.
    • The higher the solute concentration, the lower (more negative) the water potential.