Separating Mixtures

You can separate components of a mixture because:

• they are chemically combined

• they have different physical properties

• they are all liquids

• they are all solids

The separation techniques discussed in the reading manipulate which properties to separate components of a mixture?

• Color and taste

• Physical properties such as boiling point and solubility

• Chemical reactivity

• Electrical conductivity

Mechanical separation and filtration are both methods used to separate mixtures. Which of the following best describes the difference between them?

• Mechanical separation uses physical means like sieving or decanting, while filtration uses a filter to separate solids from liquids.

• Mechanical separation and filtration both use filters to separate mixtures.

• Filtration is used only for gases, while mechanical separation is used for liquids.

• Mechanical separation uses chemical reactions, while filtration does not.

Which of the following separation techniques is the most specific or exclusive?

• Filtration

• Distillation

• Chromatography

• Evaporation

Which sequence of separation techniques would you use to separate a mixture of water, tiny iron nails, gravel and glass marbles?

• Use a magnet to remove the iron nails, then use sieving to separate the gravel and glass marbles, and finally use filtration to separate any remaining solids from the water.

• Use filtration to remove the water first, then use a magnet to separate the iron nails, and finally use evaporation to separate the gravel and glass marbles.

• Use evaporation to remove the water, then use a magnet to separate the iron nails, and finally use sieving to separate the gravel and glass marbles.

• Use a magnet to remove the iron nails, then use evaporation to separate the water, and finally use filtration to separate the gravel and glass marbles.

You can separate components of a mixture because:

• they are chemically combined

• they are physically combined

• they have the same properties

• they form a new substance

The separation techniques discussed in the reading manipulate which properties to separate components of a mixture?

• Physical properties

• Chemical properties

• Nuclear properties

• Electrical properties

Mechanical separation and filtration are different methods of separating mixtures. Which of the following best describes the difference between them?

• Mechanical separation uses physical means like handpicking or sieving, while filtration uses a filter to separate solids from liquids.

• Mechanical separation and filtration both use filters to separate mixtures.

• Filtration is used only for gases, while mechanical separation is used for solids.

• Mechanical separation and filtration are the same process.

Which separation technique discussed is most specific or exclusive?

• Filtration

• Distillation

• Chromatography

• Evaporation

Which sequence of separation techniques would you use to separate a mixture of water, tiny iron nails, gravel, and glass marbles?

• Use a magnet to remove iron nails, then use a sieve to separate gravel and glass marbles, and finally use filtration to separate water.

• Use filtration to remove water, then use a magnet to remove iron nails, and finally use a sieve to separate gravel and glass marbles.

• Use a sieve to separate gravel, then use a magnet to remove iron nails, and finally use filtration to separate water and glass marbles.

• Use a magnet to remove glass marbles, then use a sieve to separate iron nails and gravel, and finally use filtration to separate water.