Use separation of variables to find the general solution of the differential equation. 
Definitions:
Hypertonic
Describes a solution that has a higher concentration of solutes compared to another solution, causing cells to lose water.
Hypotonic
Describing a solution with a lower solute concentration compared to another solution, leading to water influx if two solutions are separated by a semipermeable membrane.
Isotonic
Describing a solution that has the same osmotic pressure as another solution, leading to no net movement of water across a cell membrane.
Differentially Permeable Membrane
A membrane that selectively allows certain substances to pass through it while keeping others out.
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