Separating Mixtures

Two or more substances that are together in the same place, but NOT chemically combined are known as a

• element

• compound

• molecule

• mixture

Which of the following pairs of substances may best be separated through distillation

•  sand and soil
• water and soil
• salt and sand
•  water and alcohol

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Which one of the following techniques would best be used to separate soil and water?

• Decanting
• distillation
• Filtration
• Chromatography

Which one of the following would you use to separate sand from iron filings?

• a bar magnet
• filter paper
• chromatography paper
• alum

Tags

NGSS.MS-PS2-5

Water and alcohol are easily separated by distillation because of their

•  different melting points
• different colours
• different densities
• different boiling points

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

To separate iron filings and sulfur what method should you use?

• filtration 
• sorting
• magnet
• boiling

Tags

NGSS.3-PS2-3

NGSS.3-PS2-4

How would you separate a mixture of sand and salt? 

• Mix them with water and let the water evaporate
• Mix them with water, pour the mixture through a sieve, then let the water evaporate
• Heat the sand and salt mixture for 5 minutes, then let it cool
• I would not do any of these because none of these options would work

Which one of the following is NOT a mixture?

• Sugar
• Paint
• Crude oil
• Air

Which mixture could you separate by adding water and then pouring through a coffee filter?

• sand and salt, because the salt would dissolve and the sand would not
• baking soda and salt, because they both dissolve
• sugar and salt, because they both dissolve
• iron fillings and sand, because neither one dissolves

Look at the apparatus setup. It cannot be used to separate which of the following mixtures? 

• Marble chips from oil 
• Alcohol and water
• Chalk from sugar solution
• Sand and sea water