a suspension
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A suspension is a mixture with small undissolved particles that do not settle out. These particles are typically visible to the naked eye and can be separated from the liquid by filtration. Examples include muddy water and Italian salad dressing.
Undissolved refers to a substance that has not fully mixed or dissolved in a liquid or solution. It can indicate that there are visible particles or solids still present in the liquid.
The process of separating undissolved solids from a liquid is called filtration. In filtration, the mixture is passed through a filter medium such as filter paper or a sieve, allowing the liquid to pass through while retaining the solid particles. The solid particles that are left behind on the filter medium are known as the residue, while the liquid that passes through is called the filtrate.
Filtering can trap undissolved particles because the filter mesh or barrier has small pores that physically block the particles from passing through. As the liquid is forced through the filter, the particles are unable to fit through these small openings and become trapped on the surface or within the filter media. This allows the liquid to pass through while capturing the particles.
Filtering can trap undissolved particles because the filter has tiny pores that are smaller than the particles being filtered. As the liquid passes through the filter, the particles get stuck in these pores, preventing them from passing through with the liquid. This allows the filtered liquid to flow through while trapping the particles.