When the two compartments of a cell contain equal solute concentration then the cell is said to remain in equilibrium.
When cell acheives its equilibrium state at that no movement of solute molecules occur to or from the cell.
Equilibrium state helps to maintain the cellular hameostatis by equalizing the concentration of solute molecules and ions in both the intracellular and extracellular region.
No, you don't have enough evidence because Sarah just relate the problems with the pictures but that doesn't mean that she can actually do those problems .
