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AP Bio Water Potential

AP Bio Water Potential. Water potential measures the tendency of water to leave one place in favor of another Water will always move from an area of high water potential to low water potential Water potential= pressure potential + solute potential. What effects water potential.

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AP Bio Water Potential

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  1. AP Bio Water Potential

  2. Water potential measures the tendency of water to leave one place in favor of another • Water will always move from an area of high water potential to low water potential • Water potential= pressure potential + solute potential

  3. What effects water potential • Addition of a solute (lowers water potential) • Physical pressure (raises water potential)

  4. What is solute potential • The effect that solutes have on a solution’s overall water potential. • Always a negative value

  5. Calculating percent change final-initial= divided by initial= x100=%

  6. Graphing percent change • To determine the molar concentration of potato core, see where the line crosses the ZERO (x axis) • This is where there is a molar concentration of sucrose with a water potential that is equal to the potato tissue water potential

  7. Solute potential formula • Solute potential= NEGATIVE iCRT • i=ionization constant (1.0 for sucrose) • C= Molar concentration (given) • R= pressure constant (0.0831) • T= temperature in Kelvin (273 + C) water potential is equal to solute potential

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