How can the physical properties of components within a mixture be utilised to separate a heterogeneous mixture of sand, salt, and iron filings? (3 marks)
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→ Magnetism can be used to separate iron filings from the mixture. Iron filings are magnetic, so you can easily separate them from the non-magnetic sand and salt by moving a magnet over the surface of the mixture.
→ Filtration can be used to separate the sand from the salt. Add water to the remaining mixture of sand and salt, and stir well to dissolve the salt. Since sand is insoluble in water, you can separate it by pouring the mixture through a filter paper placed in a funnel.
→ Evaporation can be used to recover the salt. Finally, to separate the salt from the water, heat the saltwater solution until the water evaporates. The salt will be left behind as a solid residue.
→ Magnetism can be used to separate iron filings from the mixture. Iron filings are magnetic, so you can easily separate them from the non-magnetic sand and salt by moving a magnet over the surface of the mixture.
→ Filtration can be used to separate the sand from the salt. Add water to the remaining mixture of sand and salt, and stir well to dissolve the salt. Since sand is insoluble in water, you can separate it by pouring the mixture through a filter paper placed in a funnel.
→ Evaporation can be used to recover the salt. Finally, to separate the salt from the water, heat the saltwater solution until the water evaporates. The salt will be left behind as a solid residue.