Lesson 4: Separation Techniques for Mixtures

Question 1

process that separates a mixture of large objects with obvious physical properties like size, color, and texture; ex: hand picking

Answer 1

Physical manipulation

Question 2

best used when a mixture can be distinguished by the different particle sizes of its components; through the pores of a sieve

Answer 2

Sieving

Question 3

process that separates non-mixing (immiscible) mixture such as sand and water, or oil and water

Answer 3

Decantation

Question 4

How is decantation done?

Answer 4

allowing the mixture to settle until a clear separation is evident; then, supernatant (less dense) is poured off, leaving the denser substance behind

Question 5

process that separates magnetic and nonmagnetic materials using magnetic force.

Answer 5

Magnetic separation

Question 6

process that takes advantage of difference in the physical states of the components of the mixture by separating an undissolved solid from a liquid using a filter paper

Answer 6

filtration/sedimentation