Step-by-step explanation:
Sedimentation and decantation are separation techniques that rely on the differences in densities of the solid and liquid components. In the case of a solid dissolving in a liquid, the solid particles become uniformly dispersed throughout the liquid, forming a homogeneous mixture.
Since the solid particles are not settling down due to gravity and instead are evenly distributed throughout the liquid, sedimentation cannot be used to separate the solid from the liquid. Similarly, decantation, which involves pouring off the liquid while leaving the settled solid behind, is not applicable because there is no settled solid.
To separate a dissolved solid from a liquid, other separation techniques such as filtration or evaporation may be used. Filtration involves passing the mixture through a filter medium that retains the solid particles while allowing the liquid to pass through. Evaporation involves heating the mixture to vaporize the liquid component, leaving the solid behind.