Separating mixtures

Question 1

What is a mixture?

Answer 1

A combination of two or more substances that are not chemically bonded.

Question 2

True or False: Mixtures can be separated by physical methods.

Answer 2

True

Question 3

What is filtration used for?

Answer 3

To separate insoluble solids from liquids.

Question 4

Fill in the blank: The process of separating a solid from a liquid using a porous barrier is called ______.

Answer 4

filtration

Question 5

What is distillation?

Answer 5

A method used to separate mixtures based on different boiling points.

Question 6

Which method would you use to separate salt from water?

Answer 6

Evaporation or distillation.

Question 7

True or False: Chromatography can be used to separate colored substances.

Answer 7

True

Question 8

What does chromatography separate based on?

Answer 8

The different affinities of substances to the stationary phase and mobile phase.

Question 9

What are the two main types of chromatography?

Answer 9

Paper chromatography and column chromatography.

Question 10

Fill in the blank: The component that moves faster in chromatography is known as the ______.

Answer 10

mobile phase

Question 11

True or False: A magnetic separator can be used to separate iron filings from sand.

Answer 11

True

Question 12

What type of mixture can be separated using a separating funnel?

Answer 12

Immiscible liquids.

Question 13

Fill in the blank: The method used to separate a solid dissolved in a liquid by heating is called ______.

Answer 13

evaporation

Question 14

What is an example of a homogeneous mixture?

Answer 14

Saltwater.

Question 15

What is an example of a heterogeneous mixture?

Answer 15

Sand and gravel.

Question 16

Fill in the blank: The technique that uses differences in solubility to separate substances is called ______.

Answer 16

extraction

Question 17

What is the role of the stationary phase in chromatography?

Answer 17

To provide a medium for the separation of substances.

Question 18

How can you separate a mixture of sand and salt?

Answer 18

Dissolve the salt in water, filter out the sand, and then evaporate the water.

Question 19

True or False: All mixtures can be separated into their components.

Answer 19

True

Question 20

What is the main characteristic of a pure substance?

Answer 20

It has a fixed composition and distinct properties.

Question 21

What does the term ‘solubility’ refer to?

Answer 21

The ability of a substance to dissolve in a solvent.

Question 22

What equipment is commonly used for filtration?

Answer 22

Filter paper and a funnel.

Question 23

Fill in the blank: The process of separating a liquid mixture into its components by boiling and condensing is called ______.

Answer 23

distillation

Question 24

What is the main use of a separating funnel?

Answer 24

To separate two immiscible liquids based on density.