B. When dissolved solute and undissolved solute exist in equilibrium with each other in a solution, that solution is said to be \"supersaturated\". a supersaturated solution has more undissolved solute than would be possible at equilibrium. Solution B. When dissolved solute and undissolved solute exist in equilibrium with each other in a solution, that solution is said to be \"supersaturated\". a supersaturated solution has more undissolved solute than would be possible at equilibrium..