Question

This method is used to separate mixture whose components have different densities.

Answer 1

Different separation techniques present depending upon the property of the substances to be separated and the simpler processes involved:

Separating funnel

• This method used to separate two or more immiscible liquids, i.e liquids which are not miscible with each other.
• When this mixture of liquids taken in a separating funnel, they form different layer dependig on the density.
• The liquid with lower denstiy will form upper layer and liquid with higher density will form lower layer.
• The lower layer can be collected by opening the stopper of the separating funnel and upper layer remain within the funnel.
• The mixture of oil and water can be separated by this process, where the oil form upper layer and water will form the lower layer.

Centrifugation

• This method also separate the components depending on the difference in density.
• The mixture taken in centrifuging tube when allowed to rotate on a centrifugal machine, the heavier particles forced to move to the bottom, so the dispersed particles can be separated.
• We can separate cream from milk using this process, (milk is a colloid where fat globules are dispersed in the water which is the dispersion medium).

Thus to separate components having different densities, we can use a separating funnel and centrifugation technique.