Separating Mixtures

Question 1

A mixture contains sand and table salt (NaCl). Which separation technique would be most appropriate to separate the sand from the salt?

Accepted Answer

Filtration, because the sand does not dissolve in water while the salt does, so the sand can be collected on filter paper.

Answer

Chromatography, because the different components will travel at different rates on the paper.

Answer

Crystallisation, because the salt will form crystals while the sand remains dissolved.

Answer

Distillation, because heating will vaporize the salt and leave the sand behind.

Question 2

A scientist has a mixture of water and isopropyl alcohol and wants to collect the pure water. Which separation technique should they use?

Accepted Answer

Simple distillation, because water and alcohol have different boiling points.

Answer

Filtration, because it can separate liquids based on particle size.

Answer

Chromatography, because the components will travel different distances on paper.

Answer

Crystallisation, because the mixture can be cooled to form solid crystals.

Question 3

A scientist has a mixture of sand and table salt (NaCl) and wants to separate the sand from the salt. Which separation technique should she use first?

Accepted Answer

Filtration

Answer

Crystallisation

Answer

Chromatography

Answer

Distillation

Try three questions

A mixture contains sand and table salt (NaCl). Which separation technique would be most appropriate to separate the sand from the salt?

A scientist has a mixture of water and isopropyl alcohol and wants to collect the pure water. Which separation technique should they use?

A scientist has a mixture of sand and table salt (NaCl) and wants to separate the sand from the salt. Which separation technique should she use first?

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