Revision

Question 1

What is a solution?

Answer 1

A homogeneous mixture where one substance is dissolved in another.

Question 2

True or False: Colloids can scatter light.

Answer 2

True

Question 3

What is the main difference between a colloid and a suspension?

Answer 3

In a colloid, particles remain evenly distributed, while in a suspension, particles settle out over time.

Question 4

Fill in the blank: A solution consists of a solute and a ________.

Answer 4

solvent

Question 5

What is the Tyndall effect?

Answer 5

The scattering of light by colloidal particles.

Question 6

Give an example of a colloid.

Answer 6

Milk

Question 7

What type of mixture is blood classified as?

Answer 7

A colloid

Question 8

True or False: Suspensions are stable and do not separate over time.

Answer 8

False

Question 9

What is the particle size range for colloids?

Answer 9

1 nm to 1,000 nm

Question 10

Multiple Choice: Which of the following is a characteristic of a suspension? A) Homogeneous B) Heterogeneous C) Colloidal

Answer 10

B) Heterogeneous

Question 11

What happens when you shake a suspension?

Answer 11

The particles will disperse temporarily but will eventually settle.

Question 12

Fill in the blank: Solutions are typically ________ at the molecular level.

Answer 12

homogeneous

Question 13

What is the role of the solute in a solution?

Answer 13

The substance that is dissolved.

Question 14

True or False: All colloids are visible to the naked eye.

Answer 14

False

Question 15

What is an emulsifier?

Answer 15

A substance that helps to stabilize emulsions in colloids.

Question 16

Multiple Choice: Which of the following is NOT a type of solution? A) Gas B) Liquid C) Solid D) Colloid

Answer 16

D) Colloid

Question 17

What is the main characteristic of a true solution?

Answer 17

The solute particles are completely dissolved and cannot be separated by filtration.

Question 18

Fill in the blank: __________ are mixtures where particles remain suspended without settling.

Answer 18

Colloids

Question 19

What is an example of a suspension?

Answer 19

Sand in water

Question 20

True or False: Solutions can be separated by filtration.

Answer 20

False

Question 21

What is the solvent in saltwater?

Answer 21

Water

Question 22

Multiple Choice: Which of the following describes a colloid? A) Particles settle B) Particles do not settle C) Particles are only gas

Answer 22

B) Particles do not settle

Question 23

What is the typical size range of particles in a suspension?

Answer 23

Greater than 1,000 nm

Question 24

Fill in the blank: A __________ is a mixture where one substance is evenly distributed within another.

Answer 24

solution

Question 25

What happens to the particles in a colloid when light passes through?

Answer 25

They scatter the light.

Question 26

True or False: All solutions are clear.

Answer 26

True