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About Water Potential Calculator
The Water Potential Calculator solves Ψ = Ψs + Ψp problems and computes solute potential using the Van't Hoff equation (Ψs = −iMRT). Enter any two values to solve for the third, predict water movement direction between cells, and get step-by-step explanations for AP Biology.
Includes preset ionization constants for common solutes.
FAQ
Water potential (Ψ) is the potential energy of water in a system compared to pure water. It equals the sum of solute potential (Ψs) and pressure potential (Ψp).
The Van't Hoff equation calculates solute potential: Ψs = −iMRT, where i is the ionization constant, M is molarity, R is 0.0831 L·bar/mol·K, and T is temperature in Kelvin.
Water flows from areas of higher water potential (less negative) to areas of lower water potential (more negative) by osmosis.
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