Chapter 15 - Water and Aqueous solutions

Question 1

What is chaotic movement of colloidal particles?

Answer 1

Brownain motion

Question 2

What are dissolved particles?

Answer 2

solute

Question 3

What are water samples containing dissolved substances?

Answer 3

Aqueous Solution

Question 4

What is the dissolving medium?

Answer 4

solvent

Question 5

What is another name for a homogeneous mixture?

Answer 5

solution

Question 6

What is a wetting agent such as soap or detergents?

Answer 6

surfactant

Question 7

What occurs when a solute dissolves?

Answer 7

solvation

Question 8

What are compounds that conduct electricity in aqueous solutions or the molten state?

Answer 8

Electrolyte

Question 9

What are mixtures containing particles that are intermediate in size between those of suspensions and true solutions?

Answer 9

Colloid

Question 10

What are compounds that do not conduct electricity in aqueous solutions or the molten state?

Answer 10

non electrolyte

Question 11

Are detergents used in washing machines because the reduce the surface tension of water?

Answer 11

YES

Question 12

Is the general rule - - likes dissolves likes?

Answer 12

YES

Question 13

Are electrolytes compounds that do not conduct electricity in aqueous solutions?

Answer 13

NO

Question 14

Do most polar and ionic solutes dissolve in water?

Answer 14

YES

Question 15

Is a hydrate a compound that includes a specific number of oxygen molecules bound to each formula unit?

Answer 15

NO

Question 16

Are emulsifying agents essential for forming and maintaining emulsions?

Answer 16

YES

Question 17

Why does ice float on water?

Answer 17

Its density is lower than that of the water

Question 18

What is the water considered when salt is dissolved in water?

Answer 18

solvent

Question 19

What is is the scattering of visible light know as as it passes through a colloid?

Answer 19

tyndal effect

Question 20

What is surface tension?

Answer 20

The inward force that tends to minimize the surface area of a liquid

Question 21

What is the typical particle size of suspensions?

Answer 21

1000 nanometers

Question 22

Why do we have large bodies of water?

Answer 22

Low vapor pressure

Question 23

At what temperature does the density of ice change?

Answer 23

4* C

Question 24

How is Gelatin best classed?

Answer 24

a colloidal dispersion

Question 25

What is the high surface tension of water due to?

Answer 25

hydrogen bonding between water molecules

Question 26

Why is the density of ice less than the density of water?

Answer 26

hydrogen bonding in ice produces an open framwork

Question 27

What is an example of a solution?

Answer 27

salt water

Question 28

What are the colligative properties of a solution?

Answer 28

1, high solubility

2. cannot be filtered
3. milky or cloudy in appearance

Question 29

Be able to draw and label a water molecule

Answer 29

See your notes

Question 30

Explain what the phrase - - “Like dissolves Like” means.

Answer 30

Compounds that are similar to each other have a better chance of dissolving within each other

Question 31

Draw and explain how solvation occurs.

Answer 31

See your notes

Question 32

Know the percentage chart of water on Earth.

Answer 32

See your notes