Final answer:
To remove unwanted solids from a liquid when filtration speed is not a concern, gravity-based methods such as using a sand filter or simply pouring the liquid through filter paper can be used.
Step-by-step explanation:
When the objective is to remove unwanted solids from a liquid without a concern for the speed of filtration, a simple gravity-based or vacuum-based method can be employed, where the solution is allowed to pass through a filter at its own pace. Some common materials that may be used for this purpose include filter paper, sand, and gravel. The sand filter can provide an effective means of filtration without the need for pressure, allowing water to seep through layers of sand, which traps the solid particles.
For non-time-sensitive applications, gravity filtration or simple pour-through methods typically suffice. In this approach, a mixture containing both solids and fluids is passed through a porous medium such as filter paper or a membrane which allows the liquid to pass while retaining the solids. The process can be enhanced by using other methods like vacuum filtration to draw the liquid through more quickly if needed, but for applications where filtration speed is not a concern, the simpler method works effectively.