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Introductory Water Potential Worksheet Write Symbol Pressure Potential Ionization Constant Molar Concentration Temperature (K) Pressure Constant Solute Potential Solute Potential Solute Potential Write Symbol Ψp Write Value (A) 0 Ψp Write Value (B) 0 i 1 i 2 C 2.5 C 2.5 T 298 T 298 R 0.083 R 0.083 Ψs -iCRT Ψs -iCRT Calculations: (1)(2.5)(0.083)(298) = - 6.1835 bars Answer: -6 bars Calculations: (2)(2.5)(0.083)(298) = - 123.67 bars Answer: -124 bars 1. Ψ = Ψp + Ψs (water potential = pressure potential + solute potential) 2. Ψ beaker A = 0 + -6 = -6 Ψ beaker B = 0 + -124 = -124 3. The solution of NaCl; beaker B 4. A to B 5. –iCRT = -(1)(3.5)(0.083)(298) = -86.569 = -87 bars 6. –ICRT = -(2)(0.5)(0.083)(298) = -24.734 = -25 bars 7. Cell beaker 8. 3 hours later, the cell would become hypertonic to the solution because it has greater free energy than the cell. I. a. A b. C c. B d. C e. C f. A II) a. b. c. III) a. water to cell When the water and cell are isotonic Ys = -4 Yp = 4 cell to solution b. c. d. e. IV) a. b. c. d. when the cell and solution are isotonic it will be shriveled up 0 0 cell to solution 0 -2 2 How does sugar or salt curing preserve meat? Sugar and salt work to cure meat using osmosis. The sugar and salt draw the water out of the meat Why will your favorite plant likely die if you apply twice the recommended amount of fertilizer? If you put twice the amount of fertilizer needed on your plant, then environment surrounding the plant will be hypertonic to the plants roots. As a result, osmosis will occur, and water will be drawn out from the roots of the plant. This causes the plant to die.