# Water potential problems key.pdf - Calculation of Water...

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Calculation of Water Potential
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2. Knowing the solute potential of the solution (q.) and knowing the pressure potential of the solution (Wp = 0) allows you to calculate the water potential of the solution. The is zero
=Vs3. Water potential values are useful because they allow us to predict the direction of the flow of water.Suppose that a student calculates the water potential of a solution inside a bag to be -6.25 bar (Vs = = 0) and the water potential of a solution surround the bag is -3.25 bar (Vs = -3.25, Vp = 0). ln will the water flow?-6.25, Vpwhich direction
the bag
sorution.Analysis Questions1. l'f a potato core is allowed to dehydrate by sitting in open air, would the water potential of the decrease or increase? Why?potato cells
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2. lf a plant cell has a lower water potential than its surrounding environment and if pressure is equal to zero, the cell hypertonic (in terms of solute concentration) or hypotonic to its environment? Will the cell gain lose water? Explain.iswater or
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3. What is the water potential for a sucrose solution that is 0.1M? (temperature of 22"C) Show your work.
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-[i) (o,tP (, oEi 3#{ What is the solute potential for a sucrose solution that is 0.5M? (temperature of )(215#4.
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