How do we separate these mixtures? a) sugar and sand b) water and salt c) kerosene and water d) iron fillings and sand
Answers
(b) evaporation
(c) by separating funnel
(d) by using attractive property
(a) Stir it into hot water. The sugar will dissolve like in a cup of tea. Pour through a fine mesh such as a sieve into another container. The sand will be in the sieve and the sugar will be in the liquid in the container below.
(b) water can be separated from salt solution by simple distillation. This method works because water has a much lower boiling point than salt. When the solution is heated, the water evaporates. It is then cooled and condensed into a separate container.
(c) Water and kerosene oil are two immiscible liquids. So, a mixture of kerosene oil and water can be separated by using a separating funnel.
(d) Iron is magnetic and the other two not, which means a magnet could be used to attract the iron filings out of the mixture, leaving the salt and sand. Salt is water soluble, while sand is not. This means the two can be mixed in water and stirred. The salt will dissolve and the sand will not.