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Osmosis & Water Potential Calculator
AP Biology · Unit 2 Cell Structure & Function
Learning Objectives
Water moves from High $\Psi$ to Low $\Psi$
$\Psi$ = $\Psi_s$ + $\Psi_p$ (Total Potential = Solute + Pressure)
$\Psi_s = -iCRT$ (Solute Potential Formula is always negative)
Plant cells use Turgor Pressure ($\Psi_p > 0$) to maintain structure
Tags
osmosis
water potential
turgor pressure
solute
membrane
0.0
$\Psi$ (Total Potential)
=
0.0
$\Psi_s$ (Solute Potential)
+
0.0
$\Psi_p$ (Pressure Potential)
Inside the Cell ($\Psi_{IN}$)
Solute Concentration (C)
0.3 M
Turgor Pressure ($\Psi_p$)
0.5 MPa
Outside Solution ($\Psi_{OUT}$)
Solute Concentration (C)
0.1 M
Temperature (T)
20°C
$\Psi$ INSIDE
-0.23
$\Psi$ OUTSIDE
-0.24
Net Water Movement
Out of the Cell →
(Hypertonic Environment)