# From an area of high water potential to an area of

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2. Predict the direction in which water will flow given the following information: A student calculates that the water potential of a solution in a dialysis bag is equal to -6.25 bars (Ψs = -6.25, Ψp= 0). The water potential of a solution surrounding the bag is -3.25 bars (Ψs = -3.25,Ψp= 0). In which direction will water flow? Justify your answer.)
20 points(2 points)3. If a plant cell’s water potential is lower than its surrounding environment and if pressure is equal to zero, is the cell hypertonic (in terms of solute concentration) or hypotonic to its environment? Will the cell gain or lose water? Justify your answer. (3 points)4. If yam cores were placed in a salt (NaCl) solution at 22 °C for 24 hours and the molar concentration is determined to be 0.34 M, calculate the water potential. (Ionization constant for NaCl = 2.0) Show ALL of your work in the space below. Include the formula and don’t forget units. (3 points)5. What effect does adding solute have on the solute potential component (Ψs) of that solution? Justify your answer. (2 points)6. If a cell’s Ψp= 3 bars and its Ψs = -4.5 bars, what is the resultingΨ? Show ALL of your work in the space below. Include the formula and don’t forget units. (2 points)7. At 20 °C, a cell with Ψpof 3 bars is in equilibrium with the surrounding 0.4M sucrose solution in an open container. What is themolar concentration of sucrose in the cell? Show ALL of your work in the space below. Include the formula and don’t forget units. (5 points)
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