AP Water Potential Sample Questions Key.docx - Name Period...

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Name: Period: Date: AP Water Potential Sample Questions - Answer KeyΨ = ΨP + ΨSΨ= water potentialΨP = pressure potentialΨS = solute potentialΨS = -iCRTi = ionization constant (this is 1.0 for sucrose because sucrose does not ionize in water)C= molar concentrationR= pressure constant (R = 0.0831 liter bars/mole K)T= temperature in Kelvin (OC + 273)1.If a plant cell’s ΨP = 2 bars and its ΨS = -3.5 bars, what is the resulting Ψ?
2.The plant cell from question #1 is placed in a beaker of sugar water with ΨS = -4.0 bars. What is the Ψ of the sugar solution, and in which direction will the net flow of water be?

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