Question

What type of mixtures can be
separated by sedimentation and decantation? Provide 5 examples of such mixtures.​

Answer 1

Answer:

n a mixture of sand and water, the heavier sand particles settle down at the bottom and the water can be separated by decantation.

Filtration can be used to separate components of a mixture of an insoluble solid and a liquid.

Evaporation is the process in which a liquid gets converted into its vapour. Evaporation can be used to separate a solid dissolved in a liquid.

A saturated solution is one in which no more of that substance can be dissolved.

More of a substance can be dissolved in a solution by heating it.

Water dissolves different amount of soluble substances in it.

Answer 2

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SEDIMENTATION

Sedimentation is a physical water treatment process using gravity to remove suspended solids from water. Solid particles entrained by the turbulence of moving water may be removed naturally by sedimentation in the still water of lakes and oceans. Settling basins are ponds constructed for the purpose of removing entrained solids by sedimentation.Clarifiers are tanks built with mechanical means for continuous removal of solids being deposited by sedimentation. Clarification does not remove dissolved species.Sedimentation is the act of depositing sediment.

EXAMPLES

The sediments is formed from weathering and erosion of mountains and the sediments is transporting by Current regime ( Gravity Force , waves , current ) , then it deposited in sedimentary basin and the sediment particles cemented to other and form sedimentary rock .

Sedimentary rock such as ( Conglomerate , Sandstones , Shales , Anhydraite , Salt , Limestone ,…. Etc ) .

DECANTATION

Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.The layer closer to the top of the container—the less dense of the two liquids, or the liquid from which the precipitate or sediment has settled out—is poured off, leaving the other component or the more dense liquid of the mixture behind. An incomplete separation is witnessed during the separation of two immiscible liquids

EXAMPLES

.For e.g., if we take a slightly muddy sample and add some alum to it, after some time we observe that a layer of mud settles at the bottom of the vessel and water becomes clear. Here, the alum got adhered to the small bud particles and made it heavier, thus causing the mud to settle at the bottom. This process is used during the filtration of water in water filtration tanks.