The mixture containing sand is filtered by pouring over a filter paper kept in a funnel. Sand remains as a residue on the filter paper and mixture of water and kerosene is obtained as a filtrate in a beaker kept below the funnel.

When the mixture of water and kerosene is put in a separating funnel, it forms two layers. Water being heavier, forms the lower layer in the separating funnel whereas kerosene being lighter forms the upper layer. On opening the stop cock of separating funnel, the lower layer of water comes out first and collected in a beaker. When water layer has completely run off, then stop cock is closed. the kerosene is left behind in the separating funnel. It can be removed in a separate beaker by opening the stop cock again.